Remove another fixed test from the 262 whitelist

Author: marijnh

bin/test262.whitelist

@@ -312,7 +312,6 @@ language/statements/if/labelled-fn-stmt-lone.js (default)
 language/statements/if/labelled-fn-stmt-second.js (default)
 language/statements/if/let-block-with-newline.js (default)
 language/statements/if/let-identifier-with-newline.js (default)
-language/statements/labeled/decl-async-function.js (default)
 language/statements/labeled/let-block-with-newline.js (default)
 language/statements/labeled/let-identifier-with-newline.js (default)
 language/statements/let/syntax/identifier-let-disallowed-as-boundname.js (default)