Remove GetTid() since it is not used.

PiperOrigin-RevId: 393453493

cpp/platform/api/executor.h

@@ -35,8 +35,6 @@ class Executor {
 
   // https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html#shutdown--
   virtual void Shutdown() = 0;
-
-  virtual int GetTid(int index) const = 0;
 };
 
 }  // namespace api

cpp/platform/impl/g3/multi_thread_executor.h

@@ -47,11 +47,6 @@ class MultiThreadExecutor : public api::SubmittableExecutor {
   void Shutdown() override { DoShutdown(); }
   ~MultiThreadExecutor() override { DoShutdown(); }
 
-  int GetTid(int index) const override {
-    const auto* thread = thread_pool_.thread(index);
-    return thread ? thread->tid() : 0;
-  }
-
   void ScheduleAfter(absl::Duration delay, Runnable&& runnable) {
     if (shutdown_) return;
     thread_pool_.ScheduleAt(absl::Now() + delay, std::move(runnable));

cpp/platform/impl/g3/scheduled_executor.h

@@ -43,8 +43,6 @@ class ScheduledExecutor final : public api::ScheduledExecutor {
                                             absl::Duration delay) override;
   void Shutdown() override { executor_.Shutdown(); }
 
-  int GetTid(int index) const override { return executor_.GetTid(index); }
-
  private:
   SingleThreadExecutor executor_;
 };

cpp/platform/public/scheduled_executor.h

@@ -78,12 +78,6 @@ class ABSL_LOCKABLE ScheduledExecutor final : public Lockable {
     DoShutdown();
   }
 
-  int GetTid(int index) const {
-    MutexLock lock(&mutex_);
-    return impl_->GetTid(index);
-  }
-  int Tid() const { return GetTid(0); }
-
   Cancelable Schedule(Runnable&& runnable, absl::Duration duration)
       ABSL_LOCKS_EXCLUDED(mutex_) {
     MutexLock lock(&mutex_);

cpp/platform/public/single_thread_executor.h

@@ -33,7 +33,6 @@ class ABSL_LOCKABLE SingleThreadExecutor final : public SubmittableExecutor {
   ~SingleThreadExecutor() override = default;
   SingleThreadExecutor(SingleThreadExecutor&&) = default;
   SingleThreadExecutor& operator=(SingleThreadExecutor&&) = default;
-  int Tid() const { return GetTid(0); }
 };
 
 }  // namespace nearby

cpp/platform/public/submittable_executor.h

@@ -73,11 +73,6 @@ class ABSL_LOCKABLE SubmittableExecutor : public api::SubmittableExecutor,
           MonitoredRunnable(ThreadCheckRunnable(this, std::move(runnable))));
   }
 
-  int GetTid(int index) const ABSL_LOCKS_EXCLUDED(mutex_) override {
-    MutexLock lock(&mutex_);
-    return impl_ ? impl_->GetTid(index) : 0;
-  }
-
   void Shutdown() ABSL_LOCKS_EXCLUDED(mutex_) override {
     MutexLock lock(&mutex_);
     DoShutdown();