Remove incorrect early error machinery. Fixes gh-1175 (#1177)

test/language/expressions/arrow-function/param-dflt-yield-id-non-strict.js

@@ -11,14 +11,9 @@ info: |
 
     ArrowParameters[?Yield] [no LineTerminator here] => ConciseBody[?In]
 features: [default-parameters]
-flags: [onlyStrict]
-negative:
-  phase: early
-  type: SyntaxError
+flags: [noStrict]
 ---*/
 
-throw "Test262: This statement should not be evaluated.";
-
 var yield = 23;
 var f, paramValue;