[clang] [WebAssembly] Enable musttail only when tail-call is enabled (PR #163618)

[Aaron Ballman via cfe-commits]

================
@@ -695,7 +695,6 @@ bool Sema::checkMustTailAttr(const Stmt *St, const Attr &MTA) {
 
   const Expr *E = cast<ReturnStmt>(St)->getRetValue();
   const auto *CE = dyn_cast_or_null<CallExpr>(IgnoreParenImplicitAsWritten(E));
-
----------------
AaronBallman wrote:

You can back out this change (it's the only change to the file).

https://github.com/llvm/llvm-project/pull/163618