[OpenACC][NFC] Remove temporary assert from CIndex OpenACCBindClause

This was left over from implementation and shouldn't have been left in,
but in the end 'bind' doesn't require any additional work here, so this
patch removes the assert.

Author: erichkeane

clang/tools/libclang/CIndex.cpp

@@ -2976,9 +2976,7 @@ void OpenACCClauseEnqueue::VisitIndependentClause(
     const OpenACCIndependentClause &C) {}
 void OpenACCClauseEnqueue::VisitSeqClause(const OpenACCSeqClause &C) {}
 void OpenACCClauseEnqueue::VisitNoHostClause(const OpenACCNoHostClause &C) {}
-void OpenACCClauseEnqueue::VisitBindClause(const OpenACCBindClause &C) {
-  assert(false && "TODO ERICH");
-}
+void OpenACCClauseEnqueue::VisitBindClause(const OpenACCBindClause &C) { }
 void OpenACCClauseEnqueue::VisitFinalizeClause(const OpenACCFinalizeClause &C) {
 }
 void OpenACCClauseEnqueue::VisitIfPresentClause(