Remove explorer's proto fuzzer and proto dependencies

.bazelrc

@@ -57,16 +57,6 @@ build --host_per_file_copt=external/.*\.(c|cc|cpp|cxx)$@-w
 build --per_file_copt=utils/treesitter/_treesitter.tree_sitter/.*\.c$@-w
 build --host_per_file_copt=utils/treesitter/_treesitter.tree_sitter/.*\.c$@-w
 
-# The `cc_proto_library` rule doesn't allow providing `copts`:
-# https://github.com/bazelbuild/bazel/issues/22610
-#
-# We unfortunately need to work around issues with `-Wmissing-prototypes` in
-# generated protobuf code, so pass the `copt` manually here. The warning issue
-# is likely part of:
-# https://github.com/llvm/llvm-project/issues/94138
-build --per_file_copt=.*\.pb\.cc$@-Wno-missing-prototypes
-build --host_per_file_copt=.*\.pb\.cc$@-Wno-missing-prototypes
-
 # Default dynamic linking to off. While this can help build performance in some
 # edge cases with very large linked executables and a slow linker, between using
 # fast linkers on all platforms (LLD and the Apple linker), as well as having

.pre-commit-config.yaml

@@ -85,7 +85,7 @@ repos:
       - id: clang-format
         name: clang-format
         entry: clang-format
-        types_or: [c++, proto, def]
+        types_or: [c++, def]
         language: python
         args: ['-i']
         additional_dependencies: ['clang-format==17.0.1']
@@ -184,7 +184,7 @@ repos:
             Exceptions. See /LICENSE for license information.
             SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
           - --custom_format
-          - '\.(carbon|c|json|proto|scss|ypp)(\.tmpl)?$'
+          - '\.(carbon|c|json|scss|ypp)(\.tmpl)?$'
           - ''
           - '// '
           - ''

MODULE.bazel

@@ -69,18 +69,6 @@ bazel_dep(name = "rules_bison", version = "0.2.2")
 bazel_dep(name = "rules_flex", version = "0.2.1")
 bazel_dep(name = "rules_m4", version = "0.2.3")
 bazel_dep(name = "rules_cc", version = "0.0.9")
-bazel_dep(name = "rules_proto", version = "6.0.2")
-bazel_dep(name = "protobuf", version = "27.1")
-
-libprotobuf_mutator_version = "1.3"
-
-http_archive(
-    name = "com_google_libprotobuf_mutator",
-    build_file = "@//:third_party/libprotobuf_mutator/BUILD.txt",
-    sha256 = "1ee3473a6b0274494fce599539605bb19305c0efadc62b58d645812132c31baa",
-    strip_prefix = "libprotobuf-mutator-{0}".format(libprotobuf_mutator_version),
-    urls = ["https://github.com/google/libprotobuf-mutator/archive/v{0}.tar.gz".format(libprotobuf_mutator_version)],
-)
 
 bazel_dep(name = "bazel_clang_tidy", dev_dependency = True)
 git_override(

bazel/cc_toolchains/clang_cc_toolchain_config.bzl

@@ -156,7 +156,6 @@ def _impl(ctx):
                             "--system-header-prefix=clang-tools-extra/",
                             "--system-header-prefix=clang/",
                             "--system-header-prefix=gmock/",
-                            "--system-header-prefix=google/protobuf/",
                             "--system-header-prefix=gtest/",
                             "--system-header-prefix=libfuzzer/",
                             "--system-header-prefix=llvm/",

bazel/check_deps/check_non_test_cc_deps.py

@@ -92,7 +92,6 @@
     # message.
     if repo_base in (
         "@google_benchmark",
-        "@protobuf",
         "@abseil-cpp",
         "@googletest",
     ):