Trim parser comment for COPY INTO cast bail

Author: 97nitt

src/dialect/snowflake.rs

@@ -1546,9 +1546,7 @@ fn parse_select_item_for_data_load(
     }
 
     // A trailing `::` means this is a cast expression (e.g.
-    // `$1:"col"::NUMBER(38,0)`), not a stage-load-select-item. Bail so
-    // `maybe_parse` rewinds and the caller falls through to
-    // `parse_select_item`, which handles the cast correctly.
+    // `$1:"col"::NUMBER(38,0)`), not a stage-load-select-item.
     if matches!(parser.peek_token_ref().token, Token::DoubleColon) {
         return parser.expected("stage load select item", parser.peek_token());
     }