chore: drop Rust-era toolchains and release tooling

.bazelrc

@@ -13,10 +13,6 @@ common --nolegacy_external_runfiles
 # https://bazelbuild.slack.com/archives/C014RARENH0/p1691158021917459?thread_ts=1691156601.420349&cid=C014RARENH0
 common --check_direct_dependencies=off
 
-# Minimize the size of our rust binaries
-build:release --compilation_mode=opt
-build:release --@rules_rust//rust/settings:lto=fat
-
 # Never Compile protoc Again
 # Don't build protoc from the cc_binary, it's slow and spammy when cache miss
 common --per_file_copt=external/.*protobuf.*@--PROTOBUF_WAS_NOT_SUPPOSED_TO_BE_BUILT

MODULE.bazel

@@ -10,29 +10,4 @@ bazel_dep(name = "bazel_skylib", version = "1.4.1")
 bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "aspect_bazel_lib", version = "2.22.5")
 
-bazel_dep(name = "toolchains_musl", version = "0.1.27", dev_dependency = True)
-
-toolchains_musl = use_extension(
-    "@toolchains_musl//:toolchains_musl.bzl",
-    "toolchains_musl",
-    dev_dependency = True,
-)
-toolchains_musl.config(
-    extra_target_compatible_with = ["@//tools/linkers:musl"],
-)
-
-bazel_dep(name = "toolchains_llvm", version = "1.6.0", dev_dependency = True)
-
-# Configure and register the toolchain.
-llvm = use_extension("@toolchains_llvm//toolchain/extensions:llvm.bzl", "llvm", dev_dependency = True)
-llvm.toolchain(
-    llvm_version = "16.0.0",
-)
-use_repo(llvm, "llvm_toolchain")
-
-register_toolchains(
-    "@llvm_toolchain//:all",
-    dev_dependency = True,
-)
-
 bazel_dep(name = "buildifier_prebuilt", version = "6.1.2", dev_dependency = True)