Now that the underlying issue is fixed, revert r180750 and r180722.

The cause of the windows failures was fixed by r180791. Revert to the state
after Sabre's original revert.

Original message:

revert r179735, it has no testcases, and doesn't really make sense.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180844 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/AttributeImpl.h b/lib/IR/AttributeImpl.h
index 2f7b449..0b6228b 100644
--- a/lib/IR/AttributeImpl.h
+++ b/lib/IR/AttributeImpl.h
@@ -178,7 +178,7 @@
 
   unsigned getAlignment() const;
   unsigned getStackAlignment() const;
-  std::string getAsString(bool TargetIndependent, bool InAttrGrp) const;
+  std::string getAsString(bool InAttrGrp) const;
 
   typedef SmallVectorImpl<Attribute>::iterator       iterator;
   typedef SmallVectorImpl<Attribute>::const_iterator const_iterator;