Remove GYP annotations from third_party GN files.

third_party/WebKit/Source/bindings/modules/v8/BUILD.gn

Index: third_party/WebKit/Source/bindings/modules/v8/BUILD.gn
diff --git a/third_party/WebKit/Source/bindings/modules/v8/BUILD.gn b/third_party/WebKit/Source/bindings/modules/v8/BUILD.gn
index 3b658a4710db522659c69d4209910a74776a2754..5c9d6e239eb24a620629b93eb57cc6999759b57f 100644
--- a/third_party/WebKit/Source/bindings/modules/v8/BUILD.gn
+++ b/third_party/WebKit/Source/bindings/modules/v8/BUILD.gn
@@ -9,7 +9,6 @@ import("//third_party/WebKit/Source/modules/modules_idl_files.gni")
 
 visibility = [ "//third_party/WebKit/*" ]
 
-# bindings_modules_generated in modules/v8/generated.gyp
 group("bindings_modules_generated") {
   public_deps = [
     ":bindings_modules_impl_generated",
@@ -20,8 +19,6 @@ group("bindings_modules_generated") {
 }
 
 idl_compiler("generate_bindings_modules_v8_interfaces") {
-  # Note in GYP this is modules_interface_idl_files but this variable is just
-  # defined to modules_definition_idl_files.
   sources = modules_definition_idl_files
   output_dir = bindings_modules_v8_output_dir
   output_name_suffix = ""
@@ -37,8 +34,6 @@ idl_impl("bindings_modules_impl_generated") {
 }
 
 idl_compiler("generate_bindings_modules_v8_partial_interfaces") {
-  # Note in GYP this is modules_interface_idl_files but this variable is just
-  # defined to modules_definition_idl_files.
   sources = core_idl_with_modules_dependency_files +
             webcore_testing_idl_with_modules_dependency_files
   output_dir = bindings_modules_v8_output_dir
@@ -46,7 +41,6 @@ idl_compiler("generate_bindings_modules_v8_partial_interfaces") {
   target_component = "modules"
 }
 
-# GYP version: Source/bindings/modules/v8/generated.gyp:bindings_modules_v8_generated_init_partial
 action("bindings_modules_v8_generated_init_partial") {
   script = "$bindings_scripts_dir/generate_init_partial_interfaces.py"