Use the range variant of transform instead of unpacking begin/end

No functionality change is intended.

llvm-svn: 278476
diff --git a/llvm/lib/IR/LLVMContextImpl.h b/llvm/lib/IR/LLVMContextImpl.h
index e808a60..1d0b1b1 100644
--- a/llvm/lib/IR/LLVMContextImpl.h
+++ b/llvm/lib/IR/LLVMContextImpl.h
@@ -998,7 +998,8 @@
   ///
   /// Erases all attachments matching the \c shouldRemove predicate.
   template <class PredTy> void remove_if(PredTy shouldRemove) {
-    Attachments.erase(remove_if(Attachments, shouldRemove), Attachments.end());
+    Attachments.erase(llvm::remove_if(Attachments, shouldRemove),
+                      Attachments.end());
   }
 };