Remove unused %GetV8Version

Bug:v8:5510
R=yangguo@chromium.org,jgruber@chromium.org

Change-Id: Ieb355110bd858efe2495a6271ffeda67d41af129
Reviewed-on: https://chromium-review.googlesource.com/497153Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
Cr-Commit-Position: refs/heads/master@{#45151}

src/runtime/runtime-test.cc

@@ -708,16 +708,6 @@ RUNTIME_FUNCTION(Runtime_NativeScriptsCount) {
   return Smi::FromInt(Natives::GetBuiltinsCount());
 }
 
-// TODO(5510): remove this.
-RUNTIME_FUNCTION(Runtime_GetV8Version) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(0, args.length());
-
-  const char* version_string = v8::V8::GetVersion();
-
-  return *isolate->factory()->NewStringFromAsciiChecked(version_string);
-}
-
 
 RUNTIME_FUNCTION(Runtime_DisassembleFunction) {
   HandleScope scope(isolate);

src/runtime/runtime.h

@@ -586,7 +586,6 @@ namespace internal {
   F(Abort, 1, 1)                              \
   F(AbortJS, 1, 1)                            \
   F(NativeScriptsCount, 0, 1)                 \
-  F(GetV8Version, 0, 1)                       \
   F(DisassembleFunction, 1, 1)                \
   F(TraceEnter, 0, 1)                         \
   F(TraceExit, 1, 1)                          \