Remove superfluous ClassBody restriction

Author: rbuckton

spec.html

@@ -21738,7 +21738,7 @@ <h1>Static Semantics: Early Errors</h1>
             It is a Syntax Error if the BoundNames of |BindingList| contains any duplicate entries.
           </li>
           <li>
-            It is a Syntax Error if the goal symbol is |Script| and |UsingDeclaration| is not contained, either directly or indirectly, within a |Block|, |CaseBlock|, |ForStatement|, |ForInOfStatement|, |FunctionBody|, |GeneratorBody|, |AsyncGeneratorBody|, |AsyncFunctionBody|, |ClassStaticBlockBody|, or |ClassBody|.
+            It is a Syntax Error if the goal symbol is |Script| and |UsingDeclaration| is not contained, either directly or indirectly, within a |Block|, |CaseBlock|, |ForStatement|, |ForInOfStatement|, |FunctionBody|, |GeneratorBody|, |AsyncGeneratorBody|, |AsyncFunctionBody|, or |ClassStaticBlockBody|.
           </li>
         </ul>
         <emu-grammar>
@@ -21754,7 +21754,7 @@ <h1>Static Semantics: Early Errors</h1>
             It is a Syntax Error if the BoundNames of |BindingList| contains any duplicate entries.
           </li>
           <li>
-            It is a Syntax Error if the goal symbol is |Script| and |AwaitUsingDeclaration| is not contained, either directly or indirectly, within a |Block|, |CaseBlock|, |ForStatement|, |ForInOfStatement|, |FunctionBody|, |GeneratorBody|, |AsyncGeneratorBody|, |AsyncFunctionBody|, |ClassStaticBlockBody|, or |ClassBody|.
+            It is a Syntax Error if the goal symbol is |Script| and |AwaitUsingDeclaration| is not contained, either directly or indirectly, within a |Block|, |CaseBlock|, |ForStatement|, |ForInOfStatement|, |FunctionBody|, |GeneratorBody|, |AsyncGeneratorBody|, |AsyncFunctionBody|, or |ClassStaticBlockBody|.
           </li>
         </ul>
         <emu-grammar>LexicalBinding : BindingIdentifier Initializer?</emu-grammar>