IdentifierResolver: Remove an unnecessary include and an unused parameter.

llvm-svn: 170297
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index cae0cfa..1f80390 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -1096,7 +1096,7 @@
 
 bool Sema::isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S,
                          bool ExplicitInstantiationOrSpecialization) {
-  return IdResolver.isDeclInScope(D, Ctx, Context, S,
+  return IdResolver.isDeclInScope(D, Ctx, S,
                                   ExplicitInstantiationOrSpecialization);
 }