[CodeGen] Remove unused declaration createJumpInstrTablesPass

The corresponding function definition was removed by:

  commit 3b94e33
  Author: Eric Christopher <echristo@gmail.com>
  Date:   Fri Feb 27 19:03:38 2015 +0000

llvm/include/llvm/CodeGen/Passes.h

@@ -446,9 +446,6 @@ namespace llvm {
   /// LiveDebugValues pass
   extern char &LiveDebugValuesID;
 
-  /// createJumpInstrTables - This pass creates jump-instruction tables.
-  ModulePass *createJumpInstrTablesPass();
-
   /// InterleavedAccess Pass - This pass identifies and matches interleaved
   /// memory accesses to target specific intrinsics.
   ///