[ORC] Remove an undefined static method from LLJIT.

Fixes http://llvm.org/PR44255. Thanks to Raoul Gough for finding the bug!

Author: lhames

llvm/include/llvm/ExecutionEngine/Orc/LLJIT.h

@@ -53,8 +53,6 @@ class LLJIT {
                                  IRTransformLayer::TransformFunction T);
   };
 
-  static Expected<std::unique_ptr<LLJIT>> Create(LLJITBuilderState &S);
-
   /// Destruct this instance. If a multi-threaded instance, waits for all
   /// compile threads to complete.
   ~LLJIT();