MDEV-29440 fixup: Clean up dict_load_foreigns()

dict_load_foreigns(): Remove the constant parameter uncommitted=false.
The parameter only had to be added to dict_load_foreign().

Spotted by Alexey Midenkov

storage/innobase/dict/dict0load.cc

@@ -2495,7 +2495,7 @@ static dict_table_t *dict_load_table_one(const span<const char> &name,
 	if (!table->is_readable()) {
 		/* Don't attempt to load the indexes from disk. */
 	} else if (err == DB_SUCCESS) {
-		err = dict_load_foreigns(table->name.m_name, nullptr, false,
+		err = dict_load_foreigns(table->name.m_name, nullptr,
 					 0, true, ignore_err, fk_tables);
 
 		if (err != DB_SUCCESS) {
@@ -3045,8 +3045,6 @@ dict_load_foreigns(
 	const char*		table_name,	/*!< in: table name */
 	const char**		col_names,	/*!< in: column names, or NULL
 						to use table->col_names */
-	bool			uncommitted,	/*!< in: use READ UNCOMMITTED
-						transaction isolation level */
 	trx_id_t		trx_id,		/*!< in: DDL transaction id,
 						or 0 to check
 						recursive load of tables
@@ -3161,7 +3159,7 @@ dict_load_foreigns(
 	/* Load the foreign constraint definition to the dictionary cache */
 
 	err = len < sizeof fk_id
-		? dict_load_foreign(table_name, uncommitted, col_names, trx_id,
+		? dict_load_foreign(table_name, false, col_names, trx_id,
 				    check_recursive, check_charsets,
 				    {fk_id, len}, ignore_err, fk_tables)
 		: DB_CORRUPTION;

storage/innobase/handler/ha_innodb.cc

@@ -12826,7 +12826,7 @@ int create_table_info_t::create_table(bool create_fk)
 	if (err == DB_SUCCESS) {
 		/* Check that also referencing constraints are ok */
 		dict_names_t	fk_tables;
-		err = dict_load_foreigns(m_table_name, nullptr, false,
+		err = dict_load_foreigns(m_table_name, nullptr,
 					 m_trx->id, true,
 					 DICT_ERR_IGNORE_NONE, fk_tables);
 		while (err == DB_SUCCESS && !fk_tables.empty()) {

storage/innobase/handler/handler0alter.cc

@@ -9881,7 +9881,7 @@ innobase_update_foreign_cache(
 	dict_names_t	fk_tables;
 
 	err = dict_load_foreigns(user_table->name.m_name,
-				 ctx->col_names, false, 1, true,
+				 ctx->col_names, 1, true,
 				 DICT_ERR_IGNORE_NONE,
 				 fk_tables);
 
@@ -9892,7 +9892,7 @@ innobase_update_foreign_cache(
 		loaded with "foreign_key checks" off,
 		so let's retry the loading with charset_check is off */
 		err = dict_load_foreigns(user_table->name.m_name,
-					 ctx->col_names, false, 1, false,
+					 ctx->col_names, 1, false,
 					 DICT_ERR_IGNORE_NONE,
 					 fk_tables);
 

storage/innobase/include/dict0load.h

@@ -89,8 +89,6 @@ dict_load_foreigns(
 	const char*		table_name,	/*!< in: table name */
 	const char**		col_names,	/*!< in: column names, or NULL
 						to use table->col_names */
-	bool			uncommitted,	/*!< in: use READ UNCOMMITTED
-						transaction isolation level */
 	trx_id_t		trx_id,		/*!< in: DDL transaction id,
 						or 0 to check
 						recursive load of tables

storage/innobase/row/row0mysql.cc

@@ -2869,7 +2869,7 @@ row_rename_table_for_mysql(
 		dict_names_t	fk_tables;
 
 		err = dict_load_foreigns(
-			new_name, nullptr, false, trx->id,
+			new_name, nullptr, trx->id,
 			!old_is_tmp || trx->check_foreigns,
 			use_fk
 			? DICT_ERR_IGNORE_NONE