Delete com_google_protobuf_previous_release and associated breaking tests

When trying to land https://github.com/protocolbuffers/protobuf/pull/28957, I ran into problems with the `@com_google_protobuf_previous_release` repo.  The root cause of these problems was that this repo combines a previous version of all of our `.bzl` files (like `proto_library.bzl`) with the *current* version of our `MODULE.bazel` file.

This is a combination that no user will actually encounter, and when skew between the two causes issues, it is very difficult to debug and fix.

If we want to re-introduce these breaking change tests in the future, an alternative approach that would cause fewer problems is to use the examples module at https://github.com/protocolbuffers/protobuf/tree/main/examples.  That module could include previous versions of the `.proto` files, as well as the breaking change tests to compare against the protos in `@com_google_protobuf`.

Since the examples module does not contain a copy of all our `.bzl` files, this design would avoid the `.bzl` skew that causes problems in the current setup.

PiperOrigin-RevId: 970790688

MODULE.bazel

@@ -262,7 +262,6 @@ protobuf_maven_dev.install(
 use_repo(protobuf_maven_dev, "protobuf_maven_dev")
 
 bazel_dep(name = "googletest", version = "1.17.0.bcr.2", dev_dependency = True)
-bazel_dep(name = "rules_buf", version = "0.3.0", dev_dependency = True)
 bazel_dep(name = "rules_testing", version = "0.9.0", dev_dependency = True)
 bazel_dep(
     name = "abseil-py",
@@ -302,18 +301,6 @@ archive_override(
     urls = ["https://github.com/protocolbuffers/protobuf/releases/download/v25.0/protobuf-25.0.tar.gz"],
 )
 
-bazel_dep(name = "com_google_protobuf_previous_release", version = "33.0", dev_dependency = True)
-archive_override(
-    module_name = "com_google_protobuf_previous_release",
-    integrity = "sha256-y8U2BkcGtijc/lB77zhu8+IhTVY2V2EilvF4GqFV7gc=",
-    patch_strip = 1,
-    patches = [
-        "@com_google_protobuf//:patches/protobuf_v33/0001-Update-module-name.patch",
-    ],
-    strip_prefix = "protobuf-33.0",
-    urls = ["https://github.com/protocolbuffers/protobuf/releases/download/v33.0/protobuf-33.0.tar.gz"],
-)
-
 # Register C++ toolchains for cross-compilation. These are used for compiling release binaries of
 # protoc and the Python extension. They are disabled unless --//toolchain:release=true is passed.
 register_toolchains(

WORKSPACE

@@ -262,29 +262,6 @@ http_archive(
     url = "https://github.com/bazelbuild/rules_testing/releases/download/v0.9.0/rules_testing-v0.9.0.tar.gz",
 )
 
-# For checking breaking changes to well-known types from the previous release version.
-http_archive(
-    name = "com_google_protobuf_previous_release",
-    integrity = "sha256-EKDVjzmhqQnpXgDougtbHcZNApl/dBFRlTorNln254w=",
-    strip_prefix = "protobuf-29.0",
-    urls = ["https://github.com/protocolbuffers/protobuf/releases/download/v29.0/protobuf-29.0.tar.gz"],
-)
-
-http_archive(
-    name = "rules_buf",
-    integrity = "sha256-Hr64Q/CaYr0E3ptAjEOgdZd1yc+cBjp7OG1wzuf3DIs=",
-    strip_prefix = "rules_buf-0.3.0",
-    urls = [
-        "https://github.com/bufbuild/rules_buf/archive/refs/tags/v0.3.0.zip",
-    ],
-)
-
-load("@rules_buf//buf:repositories.bzl", "rules_buf_dependencies", "rules_buf_toolchains")
-
-rules_buf_dependencies()
-
-rules_buf_toolchains(version = "v1.32.1")
-
 register_toolchains(
     "//toolchain:osx-x86_64-toolchain",
     "//toolchain:osx-aarch_64-toolchain",

compatibility/BUILD.bazel

@@ -1,4 +1,3 @@
-load("@rules_buf//buf:defs.bzl", "buf_breaking_test")
 load("@rules_java//java:java_library.bzl", "java_library")
 
 # Simple build tests for compatibility of gencode from previous major versions
@@ -23,122 +22,3 @@ java_library(
     visibility = ["//java/core:__pkg__"],
     deps = ["@com_google_protobuf_v25//java/core"],
 )
-
-# Breaking change detection for well-known types and descriptor.proto.
-buf_breaking_test(
-    name = "any_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:any_proto",
-    config = ":buf.yaml",
-    targets = ["//:any_proto"],
-)
-
-buf_breaking_test(
-    name = "api_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:api_proto",
-    config = ":buf.yaml",
-    targets = ["//:api_proto"],
-)
-
-buf_breaking_test(
-    name = "descriptor_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:descriptor_proto",
-    config = ":buf.yaml",
-    targets = ["//:descriptor_proto"],
-)
-
-buf_breaking_test(
-    name = "duration_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:duration_proto",
-    config = ":buf.yaml",
-    targets = ["//:duration_proto"],
-)
-
-buf_breaking_test(
-    name = "empty_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:empty_proto",
-    config = ":buf.yaml",
-    targets = ["//:empty_proto"],
-)
-
-buf_breaking_test(
-    name = "field_mask_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:field_mask_proto",
-    config = ":buf.yaml",
-    targets = ["//:field_mask_proto"],
-)
-
-buf_breaking_test(
-    name = "source_context_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:source_context_proto",
-    config = ":buf.yaml",
-    targets = ["//:source_context_proto"],
-)
-
-buf_breaking_test(
-    name = "struct_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:struct_proto",
-    config = ":buf.yaml",
-    targets = ["//:struct_proto"],
-)
-
-buf_breaking_test(
-    name = "timestamp_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:timestamp_proto",
-    config = ":buf.yaml",
-    targets = ["//:timestamp_proto"],
-)
-
-buf_breaking_test(
-    name = "type_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:type_proto",
-    config = ":buf.yaml",
-    targets = ["//:type_proto"],
-)
-
-buf_breaking_test(
-    name = "wrappers_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:wrappers_proto",
-    config = ":buf.yaml",
-    targets = ["//:wrappers_proto"],
-)
-
-buf_breaking_test(
-    name = "compiler_plugin_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:compiler_plugin_proto",
-    config = ":buf.yaml",
-    targets = ["//:compiler_plugin_proto"],
-)
-
-buf_breaking_test(
-    name = "cpp_features_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:cpp_features_proto",
-    config = ":buf.yaml",
-    targets = ["//:cpp_features_proto"],
-)
-
-buf_breaking_test(
-    name = "java_features_proto_breaking",
-    against = "@com_google_protobuf_previous_release//:java_features_proto",
-    config = ":buf.yaml",
-    targets = ["//:java_features_proto"],
-)
-
-test_suite(
-    name = "proto_breaking",
-    tests = [
-        "any_proto_breaking",
-        "api_proto_breaking",
-        "compiler_plugin_proto_breaking",
-        "cpp_features_proto_breaking",
-        "descriptor_proto_breaking",
-        "duration_proto_breaking",
-        "empty_proto_breaking",
-        "field_mask_proto_breaking",
-        "java_features_proto_breaking",
-        "source_context_proto_breaking",
-        "struct_proto_breaking",
-        "timestamp_proto_breaking",
-        "type_proto_breaking",
-        "wrappers_proto_breaking",
-    ],
-)

compatibility/buf.yaml

@@ -1 +0,0 @@
-version: v1

patches/protobuf_v33/0001-Update-module-name.patch

@@ -1,21 +0,0 @@
---- a/MODULE.bazel
-+++ b/MODULE.bazel
-@@ -5,3 +5,3 @@
- module(
--    name = "protobuf",
-+    name = "com_google_protobuf_previous_release",
-     version = "33.0",  # Automatically updated on release
-@@ -293,13 +293,1 @@
- )
--
--bazel_dep(name = "com_google_protobuf_previous_release", version = "29.0", dev_dependency = True)
--archive_override(
--    module_name = "com_google_protobuf_previous_release",
--    integrity = "sha256-EKDVjzmhqQnpXgDougtbHcZNApl/dBFRlTorNln254w=",
--    patch_strip = 1,
--    patches = [
--        "@com_google_protobuf//:patches/protobuf_v29/0001-Update-module-name.patch",
--    ],
--    strip_prefix = "protobuf-29.0",
--    urls = ["https://github.com/protocolbuffers/protobuf/releases/download/v29.0/protobuf-29.0.tar.gz"],
--)