src: remove redundant v8::HeapSnapshot namespace

PR-URL: #32854
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

src/heap_utils.cc

@@ -328,7 +328,7 @@ inline bool WriteSnapshot(Isolate* isolate, const char* filename) {
 
 }  // namespace
 
-void DeleteHeapSnapshot(const v8::HeapSnapshot* snapshot) {
+void DeleteHeapSnapshot(const HeapSnapshot* snapshot) {
   const_cast<HeapSnapshot*>(snapshot)->Delete();
 }