Remove error disallowing for...of loops

src/compiler/checker.ts

@@ -11246,8 +11246,6 @@ module ts {
         }
 
         function checkGrammarForOfStatement(forOfStatement: ForOfStatement): boolean {
-            // Temporarily disallow for-of statements until type check work is complete.
-            return grammarErrorOnFirstToken(forOfStatement, Diagnostics.for_of_statements_are_not_currently_supported);
             if (languageVersion < ScriptTarget.ES6) {
                 return grammarErrorOnFirstToken(forOfStatement, Diagnostics.for_of_statements_are_only_available_when_targeting_ECMAScript_6_or_higher);
             }

src/compiler/diagnosticInformationMap.generated.ts

@@ -471,6 +471,5 @@ module ts {
         yield_expressions_are_not_currently_supported: { code: 9000, category: DiagnosticCategory.Error, key: "'yield' expressions are not currently supported." },
         Generators_are_not_currently_supported: { code: 9001, category: DiagnosticCategory.Error, key: "Generators are not currently supported." },
         The_arguments_object_cannot_be_referenced_in_an_arrow_function_Consider_using_a_standard_function_expression: { code: 9002, category: DiagnosticCategory.Error, key: "The 'arguments' object cannot be referenced in an arrow function. Consider using a standard function expression." },
-        for_of_statements_are_not_currently_supported: { code: 9003, category: DiagnosticCategory.Error, key: "'for...of' statements are not currently supported." },
     };
 }

src/compiler/diagnosticMessages.json

@@ -1877,9 +1877,5 @@
     "The 'arguments' object cannot be referenced in an arrow function. Consider using a standard function expression.": {
         "category": "Error",
         "code": 9002
-    },
-    "'for...of' statements are not currently supported.": {
-        "category": "Error",
-        "code": 9003
     }
 }