[Cleanup] Delete unused function SkipZeroBits.

Change-Id: I2b1cf44670e12b22bbf5115742e1d62dafec7304
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1912220
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64924}

src/utils/bit-vector.h

@@ -63,12 +63,6 @@ class V8_EXPORT_PRIVATE BitVector : public ZoneObject {
     }
 
    private:
-    uintptr_t SkipZeroBits(uintptr_t val) {
-      uintptr_t trailing_zeros = base::bits::CountTrailingZeros(val);
-      current_ += trailing_zeros;
-      return val >> trailing_zeros;
-    }
-
     BitVector* target_;
     int current_index_;
     uintptr_t current_value_;