[Refactor] Remove unused fQuit var from checkqueue.h

src/checkqueue.h

@@ -59,9 +59,6 @@ private:
      */
     unsigned int nTodo;
 
-    //! Whether we're shutting down.
-    bool fQuit;
-
     //! The maximum number of elements to be processed in one batch
     unsigned int nBatchSize;
 
@@ -89,7 +86,7 @@ private:
                 }
                 // logically, the do loop starts here
                 while (queue.empty()) {
-                    if ((fMaster || fQuit) && nTodo == 0) {
+                    if (fMaster && nTodo == 0) {
                         nTotal--;
                         bool fRet = fAllOk;
                         // reset the status for new work later
@@ -131,7 +128,7 @@ public:
     boost::mutex ControlMutex;
 
     //! Create a new check queue
-    explicit CCheckQueue(unsigned int nBatchSizeIn) : nIdle(0), nTotal(0), fAllOk(true), nTodo(0), fQuit(false), nBatchSize(nBatchSizeIn) {}
+    explicit CCheckQueue(unsigned int nBatchSizeIn) : nIdle(0), nTotal(0), fAllOk(true), nTodo(0), nBatchSize(nBatchSizeIn) {}
 
     //! Worker thread
     void Thread()