[Tracing] Remove AppendLongInteger in TracedValue.

src/tracing/traced-value.cc

Index: src/tracing/traced-value.cc
diff --git a/src/tracing/traced-value.cc b/src/tracing/traced-value.cc
index 0c73b042956422876c461efdd3d7e7a9f1604e3c..3406bbf6fe71bfbbb16e53471abda711eeeb99ec 100644
--- a/src/tracing/traced-value.cc
+++ b/src/tracing/traced-value.cc
@@ -121,12 +121,6 @@ void TracedValue::AppendInteger(int value) {
   data_ += std::to_string(value);
 }
 
-void TracedValue::AppendLongInteger(int64_t value) {
-  DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
-  WriteComma();
-  data_ += std::to_string(value);
-}
-
 void TracedValue::AppendDouble(double value) {
   DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
   WriteComma();