Remove useless code

src/Common/SimpleIncrement.h

@@ -8,9 +8,7 @@
   */
 struct SimpleIncrement
 {
-    std::atomic<UInt64> value;
-
-    SimpleIncrement(UInt64 start = 0) : value(start) {}
+    std::atomic<UInt64> value{0};
 
     void set(UInt64 new_value)
     {

src/Storages/StorageMergeTree.h

@@ -107,7 +107,7 @@ private:
     BackgroundMovesExecutor background_moves_executor;
 
     /// For block numbers.
-    SimpleIncrement increment{0};
+    SimpleIncrement increment;
 
     /// For clearOldParts, clearOldTemporaryDirectories.
     AtomicStopwatch time_after_previous_cleanup;