[ORC] Remove a stray decl that accidentally found its way in to r361322.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@361441 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ExecutionEngine/Orc/Core.h

@@ -681,10 +681,6 @@ private:
 
   void emit(const SymbolFlagsMap &Emitted);
 
-  // Removes the given symbols from the symbol table, returning the set of
-  // pending queries.
-  AsynchronousSymbolQuery removeSymbols(const SymbolNameSet &Symbols);
-
   void notifyFailed(const SymbolNameSet &FailedSymbols);
 
   ExecutionSession &ES;