Remove 'await' restriction per March 2023 consensus. See tc39/proposa…

…l-explicit-resource-management#153

spec.html

@@ -17795,7 +17795,7 @@ <h1>Rules of Automatic Semicolon Insertion</h1>
             LeftHandSideExpression[?Yield, ?Await] [no LineTerminator here] `--`
 
           UsingDeclaration[In, Yield, Await] :
-            `using` [no LineTerminator here] [lookahead != `await`] BindingList[?In, ?Yield, ?Await, ~Pattern] `;`
+            `using` [no LineTerminator here] BindingList[?In, ?Yield, ?Await, ~Pattern] `;`
 
           ContinueStatement[Yield, Await] :
             `continue` `;`
@@ -21295,7 +21295,7 @@ <h2>Syntax</h2>
           `const`
 
         UsingDeclaration[In, Yield, Await] :
-          `using` [no LineTerminator here] [lookahead != `await`] BindingList[?In, ?Yield, ?Await, ~Pattern] `;`
+          `using` [no LineTerminator here] BindingList[?In, ?Yield, ?Await, ~Pattern] `;`
 
         BindingList[In, Yield, Await, Pattern] :
           LexicalBinding[?In, ?Yield, ?Await, ?Pattern]
@@ -21323,7 +21323,7 @@ <h1>Static Semantics: Early Errors</h1>
         </emu-grammar>
         <ul>
           <li>
-            It is a Syntax Error if the BoundNames of |BindingList| contains *"let"* or *"await"*.
+            It is a Syntax Error if the BoundNames of |BindingList| contains *"let"*.
           </li>
           <li>
             It is a Syntax Error if the BoundNames of |BindingList| contains any duplicate entries.
@@ -22001,7 +22001,7 @@ <h2>Syntax</h2>
 
         ForDeclaration[Yield, Await, Using] :
           LetOrConst ForBinding[?Yield, ?Await, +Pattern]
-          [+Using] `using` [no LineTerminator here] [lookahead != `await`] ForBinding[?Yield, ?Await, ~Pattern]
+          [+Using] `using` [no LineTerminator here] ForBinding[?Yield, ?Await, ~Pattern]
 
         ForBinding[Yield, Await, Pattern] :
           BindingIdentifier[?Yield, ?Await]