[heap] Remove dead counters and move regexp code counter to Isolate

src/codegen.cc

Index: src/codegen.cc
diff --git a/src/codegen.cc b/src/codegen.cc
index 54350698af85a1cdf788a8f2dbda2225f75f856c..251379481512ce080ed8765cf2f94abfb004cd4c 100644
--- a/src/codegen.cc
+++ b/src/codegen.cc
@@ -132,8 +132,6 @@ Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm,
       info->prologue_offset(), info->is_debug() && !is_crankshafted);
   isolate->counters()->total_compiled_code_size()->Increment(
       code->instruction_size());
-  isolate->heap()->IncrementCodeGeneratedBytes(is_crankshafted,
-      code->instruction_size());
   return code;
 }