message: Remove unnecessary XlaCompiler object.
diff: @@ -312,7 +312,6 @@ Status XlaCompilationCache::Compile(
  *compilation_result = &entry->compilation_result;
  if (entry->compilation_status.ok() && executable) {
  if (entry->executable == nullptr) {
  - XlaCompiler compiler(options);
  entry->compilation_status = BuildExecutable(
  options, entry->compilation_result, &entry->executable);
  }
  