Remove rules_rust dependency from MODULE.bazel for 30.x (#20310)

We're not yet ready for a stable Rust release, so the rules_rust
dependency is unnecessary for now.

.github/workflows/test_rust.yml

@@ -18,19 +18,17 @@ jobs:
       fail-fast: false   # Don't cancel all jobs if one fails.
       matrix:
         config:
-          - { name: "No bzlmod", flags: --noenable_bzlmod }
-          # TODO: b/379846319 - Fix the tests with bzlmod and enable this.
-          # - { name: "bzlmod", flags: --enable_bzlmod --enable_workspace }
-          - { name: Optimized, flags: --config=opt }
-          - { name: ASAN, flags: --config=asan }
+          - { name: Fastbuild, flags: --noenable_bzlmod }
+          - { name: Optimized, flags: --noenable_bzlmod --config=opt }
+          - { name: ASAN, flags: --noenable_bzlmod --config=asan }
 
         include:
           - targets: "//rust/... //src/google/protobuf/compiler/rust/..."
           - image: "us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:7.1.2-27cf7b86212020d7e552bc13b1e084abb971da75"
           - bazel_cmd: "test"
 
           # Override cases with custom images
-          - config: { name: Cargo }
+          - config: { name: Cargo, flags: --noenable_bzlmod }
             image: "us-docker.pkg.dev/protobuf-build/containers/release/linux/rust:7.1.2-1.74.0-d9624f2aa83cba3eaf906f751d75b36aacb9aa82"
             bazel_cmd: "run"
             targets: "//rust/release_crates:cargo_test"

MODULE.bazel

@@ -25,7 +25,6 @@ bazel_dep(name = "rules_kotlin", version = "1.9.6")
 bazel_dep(name = "rules_license", version = "1.0.0")
 bazel_dep(name = "rules_pkg", version = "1.0.1")
 bazel_dep(name = "rules_python", version = "1.0.0")
-bazel_dep(name = "rules_rust", version = "0.51.0")
 bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "zlib", version = "1.3.1.bcr.5")
 bazel_dep(name = "bazel_features", version = "1.23.0", repo_name = "proto_bazel_features")
@@ -71,18 +70,6 @@ pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip", dev_depen
 
 use_repo(pip, "protobuf_pip_deps")
 
-crate = use_extension("@rules_rust//crate_universe:extension.bzl", "crate", dev_dependency = True)
-crate.spec(
-    package = "googletest",
-    version = ">0.0.0",
-)
-crate.spec(
-    package = "paste",
-    version = ">=1",
-)
-crate.from_specs()
-use_repo(crate, crate_index = "crates")
-
 maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven", dev_dependency = True)
 maven.install(
     name = "protobuf_maven",

cmake/dependencies.cmake

@@ -23,7 +23,6 @@ set(rules_kotlin-version "1.9.6")
 set(rules_license-version "1.0.0")
 set(rules_pkg-version "1.0.1")
 set(rules_python-version "1.0.0")
-set(rules_rust-version "0.51.0")
 set(platforms-version "0.0.10")
 set(zlib-version "1.3.1.bcr.5")
 set(bazel_features-version "1.23.0")