perf(es/parser): Reduce comparison

Author: bvanjoi

crates/swc_ecma_lexer/src/common/parser/module_item.rs

@@ -348,10 +348,7 @@ fn parse_export<'a, P: Parser<'a>>(
     p.assert_and_bump(&P::Token::EXPORT);
 
     let cur = p.input().cur();
-    if cur.is_error() {
-        let err = p.input_mut().expect_error_token_and_bump();
-        return Err(err);
-    } else if cur.is_eof() {
+    if cur.is_eof() {
         return Err(eof_error(p));
     }
 

crates/swc_ecma_lexer/src/common/parser/stmt.rs

@@ -1257,9 +1257,6 @@ fn parse_stmt_internal<'a, P: Parser<'a>>(
             span: p.span(start),
         }
         .into());
-    } else if cur.is_error() {
-        let err = p.input_mut().expect_error_token_and_bump();
-        return Err(err);
     }
 
     // Handle async function foo() {}