message: [Function Library]: Remove unused test variables
  This is a cleanup following up the DeviceMgr refactor.
diff: @@ -67,9 +67,6 @@ class FunctionLibraryRuntimeTest : public ::testing::Test {
  device_mgr_.get(), Env::Default(), TF_GRAPH_DEF_VERSION, lib_def_.get(),
  opts, default_thread_pool, nullptr /* cluster_flr */));
  flr0_ = pflr_->GetFLR("/job:localhost/replica:0/task:0/cpu:0");
  - flr1_ = pflr_->GetFLR("/job:localhost/replica:0/task:0/cpu:1");
  - flr2_ = pflr_->GetFLR("/job:localhost/replica:0/task:0/cpu:2");
  - fdef_lib_ = lib_def_->ToProto();
  }
  Status Run(FunctionLibraryRuntime* flr, FunctionLibraryRuntime::Handle handle,
  @@ -193,12 +190,9 @@ class FunctionLibraryRuntimeTest : public ::testing::Test {
  }
  FunctionLibraryRuntime* flr0_;
  - FunctionLibraryRuntime* flr1_;
  - FunctionLibraryRuntime* flr2_;
  std::unique_ptr<DeviceMgr> device_mgr_;
  std::unique_ptr<FunctionLibraryDefinition> lib_def_;
  std::unique_ptr<ProcessFunctionLibraryRuntime> pflr_;
  - FunctionDefLibrary fdef_lib_;
  };
  TEST_F(FunctionLibraryRuntimeTest, DefaultThreadpool) {
  