remove spurious warning

Summary: see task

Test Plan: OK

Reviewed By: hans@fb.com

Subscribers: fugalh, folly-diffs@, jsedgwick, yfeldblum, chalfant

FB internal diff: D2099416

Tasks: 7166291

Signature: t1:2099416:1432658571:4ae632c218c4764f23e4b189167f6fdaff13dc2d

folly/wangle/concurrent/BlockingQueue.h

@@ -26,8 +26,6 @@ class BlockingQueue {
   virtual ~BlockingQueue() {}
   virtual void add(T item) = 0;
   virtual void addWithPriority(T item, int8_t priority) {
-    LOG_FIRST_N(WARNING, 1) <<
-      "add(item, priority) called on a non-priority queue";
     add(std::move(item));
   }
   virtual uint8_t getNumPriorities() {