message: Delete orphaned comment
  The comment for `loader_spec_` stuck around even after it was removed.
diff: @@ -77,8 +77,6 @@ class KernelThunk : public Thunk {
  // Will be set by IrEmitterUnnested.
  LaunchDimensions launch_dimensions_;
  - // Describes how to load this kernel. ExecuteOnStream reuses this loader
  - // specification for all executions.
  mutable tensorflow::mutex mutex_;
  // Loaded kernels for each `StreamExecutor`. Requires pointer stability of
  