heap: Remove duplicate code

Bug: chromium:1276129
Change-Id: I5d47e50c0b778e6ac1fbdbc8660c471c74424322
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3312272
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78224}

src/heap/heap-controller.cc

@@ -145,10 +145,6 @@ size_t MemoryController<Trait>::CalculateAllocationLimit(
     factor = 1.0 + FLAG_heap_growing_percent / 100.0;
   }
 
-  if (FLAG_heap_growing_percent > 0) {
-    factor = 1.0 + FLAG_heap_growing_percent / 100.0;
-  }
-
   CHECK_LT(1.0, factor);
   CHECK_LT(0, current_size);
   const uint64_t limit =