[snapshot] Remove unused SnapshotByteSource::GetIntSlow()

Change-Id: Ib05e6bde2cefa9274952b6f8790ca4ec3d490a75
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2128057
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66937}

src/snapshot/snapshot-source-sink.h

@@ -63,24 +63,6 @@ class SnapshotByteSource final {
     return answer;
   }
 
-  int GetIntSlow() {
-    // Unlike GetInt, this reads only up to the end of the blob, even if less
-    // than 4 bytes are remaining.
-    // TODO(jgruber): Remove once the use in MakeFromScriptsSource is gone.
-    DCHECK(position_ < length_);
-    uint32_t answer = data_[position_];
-    if (position_ + 1 < length_) answer |= data_[position_ + 1] << 8;
-    if (position_ + 2 < length_) answer |= data_[position_ + 2] << 16;
-    if (position_ + 3 < length_) answer |= data_[position_ + 3] << 24;
-    int bytes = (answer & 3) + 1;
-    Advance(bytes);
-    uint32_t mask = 0xffffffffu;
-    mask >>= 32 - (bytes << 3);
-    answer &= mask;
-    answer >>= 2;
-    return answer;
-  }
-
   // Returns length.
   int GetBlob(const byte** data);