fixing broken unit tests

Author: vimko

src/ast/ddl.rs

@@ -189,8 +189,6 @@ pub enum AlterTableOperation {
     },
     /// `DROP INDEX <index_name>`
     ///
-    /// Note: this is a [MySQL]-specific operation.
-    ///
     /// [MySQL]: https://dev.mysql.com/doc/refman/8.4/en/alter-table.html
     DropIndex {
         name: Ident,

tests/sqlparser_common.rs

@@ -9132,9 +9132,7 @@ fn test_create_index_with_with_clause() {
 #[test]
 fn parse_drop_index() {
     let sql = "DROP INDEX idx_a";
-    // MySql dialect doesn't support `DROP INDEX idx_a`,you need to specify a specific table, please refer:
-    // [MySql](https://dev.mysql.com/doc/refman/8.4/en/drop-index.html)
-    match all_dialects_except(|d| d.is::<MySqlDialect>()).verified_stmt(sql) {
+    match verified_stmt(sql) {
         Statement::Drop {
             names, object_type, ..
         } => {