Remove extra semi colon from cachelib/common/hothash/HotHashDetector.cpp

Summary:
`-Wextra-semi` or `-Wextra-semi-stmt`

If the code compiles, this is safe to land.

Reviewed By: jaesoo-fb

Differential Revision: D52965979

fbshipit-source-id: 48ac40eaffc1d34e243c6413bb7f2f3a14f2ae48

cachelib/common/hothash/HotHashDetector.cpp

@@ -28,7 +28,7 @@ namespace cachelib {
 uint8_t HotHashDetector::bumpHash(uint64_t hash) {
   if (UNLIKELY(++bumpsSinceMaintenance_ >= maintenanceInterval_)) {
     doMaintenance();
-  };
+  }
   auto idx = l1HashFunction(hash);
   auto l1count = ++l1Vector_[idx];
   // Checking against threshold/2, hot index should pass after one decay
@@ -114,7 +114,7 @@ void HotHashDetector::doMaintenance() {
   for (auto& cell : l2Vector_) {
     cell.count = std::min<uint32_t>(hotnessMultiplier_ - 1, cell.count / 2);
     cell.hashHits = cell.hashHits / 2;
-  };
+  }
 
   // Hashes in L2 may need to move if their preceding cell has decayed. We
   // have to run at least size() elements, but also continue running in case