[clang] Add Variadic 'dropAttrs' (PR #78476)

[Aaron Ballman via cfe-commits]

================
@@ -7068,8 +7068,7 @@ static void checkAttributesAfterMerging(Sema &S, 
NamedDecl &ND) {
   if (WeakRefAttr *Attr = ND.getAttr<WeakRefAttr>()) {
     if (ND.isExternallyVisible()) {
       S.Diag(Attr->getLocation(), diag::err_attribute_weakref_not_static);
-      ND.dropAttr<WeakRefAttr>();
-      ND.dropAttr<AliasAttr>();
+      ND.dropAttrs<WeakRefAttr, AliasAttr>();
----------------
AaronBallman wrote:

There are more instances you can modify in this file:

https://github.com/llvm/llvm-project/blob/a96b4671b97b167230986bd2811676064c608596/clang/lib/Sema/SemaDecl.cpp#L7264

https://github.com/llvm/llvm-project/blob/a96b4671b97b167230986bd2811676064c608596/clang/lib/Sema/SemaDecl.cpp#L7270

https://github.com/llvm/llvm-project/pull/78476
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