build: remove cpp toolchain as it's no longer needed in Bazel 6

https://bazel.build/concepts/platforms

.bazelrc

@@ -133,8 +133,6 @@ build:remote --jobs=150
 
 # Setup the toolchain and platform for the remote build execution. The platform
 # is provided by the shared dev-infra package and targets k8 remote containers.
-build:remote --crosstool_top=@npm//@angular/build-tooling/bazel/remote-execution/cpp:cc_toolchain_suite
-build:remote --extra_toolchains=@npm//@angular/build-tooling/bazel/remote-execution/cpp:cc_toolchain
 build:remote --extra_execution_platforms=@npm//@angular/build-tooling/bazel/remote-execution:platform_with_network
 build:remote --host_platform=@npm//@angular/build-tooling/bazel/remote-execution:platform_with_network
 build:remote --platforms=@npm//@angular/build-tooling/bazel/remote-execution:platform_with_network