LibJS/Parser: Remove superfluous switch case

Author: https://github.com/0xtechnobabble
Commit: https://github.com/SerenityOS/serenity/commit/0659d072414
Pull-request: https://github.com/SerenityOS/serenity/pull/1445
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/deoxxa

Libraries/LibJS/Parser.cpp

@@ -425,9 +425,6 @@ NonnullOwnPtr<ForStatement> Parser::parse_for_statement()
 
     OwnPtr<Statement> init = nullptr;
     switch (m_current_token.type()) {
-    case TokenType::Var:
-        init = parse_variable_declaration();
-        break;
     case TokenType::Semicolon:
         break;
     default: