Remove unused method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154827 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/Decl.h b/include/clang/AST/Decl.h
index 11696db..a02de99 100644
--- a/include/clang/AST/Decl.h
+++ b/include/clang/AST/Decl.h
@@ -244,9 +244,6 @@
     void setLinkage(Linkage L) { linkage_ = L; }
     void setVisibility(Visibility V) { visibility_ = V; }
     void setVisibility(Visibility V, bool E) { visibility_ = V; explicit_ = E; }
-    void setVisibility(LinkageInfo Other) {
-      setVisibility(Other.visibility(), Other.visibilityExplicit());
-    }
 
     void mergeLinkage(Linkage L) {
       setLinkage(minLinkage(linkage(), L));