[Impeller] Delete impeller_trace_all_gl_calls.

It's useless.

Author: chinmaygarde

impeller/BUILD.gn

@@ -30,10 +30,6 @@ config("impeller_public_config") {
     defines += [ "IMPELLER_ENABLE_VULKAN=1" ]
   }
 
-  if (impeller_trace_all_gl_calls) {
-    defines += [ "IMPELLER_TRACE_ALL_GL_CALLS" ]
-  }
-
   if (is_win) {
     defines += [
       # TODO(dnfield): https://github.com/flutter/flutter/issues/50053

impeller/renderer/backend/gles/proc_table_gles.h

@@ -85,9 +85,6 @@ struct GLProc {
     FML_CHECK(IsAvailable()) << "GL function " << name << " is not available. "
                              << "This is likely due to a missing extension.";
 #endif  // IMPELLER_DEBUG
-#ifdef IMPELLER_TRACE_ALL_GL_CALLS
-    TRACE_EVENT0("impeller", name);
-#endif  // IMPELLER_TRACE_ALL_GL_CALLS
     return function(std::forward<Args>(args)...);
   }
 

impeller/tools/args.gni

@@ -33,10 +33,6 @@ declare_args() {
   # If it is non-empty, it should be the absolute path to scenec.
   impeller_use_prebuilt_scenec = ""
 
-  # If enabled, all OpenGL calls will be traced. Because additional trace
-  # overhead may be substantial, this is not enabled by default.
-  impeller_trace_all_gl_calls = false
-
   # Enable experimental 3D scene rendering.
   impeller_enable_3d = false