Simplify execute_sql_flush() signature to drop 'using'

Now infers database alias from self.connection.
Reduces redundancy and clarifies API usage.

django/core/management/commands/flush.py

@@ -60,7 +60,7 @@ Are you sure you want to do this?
 
         if confirm == 'yes':
             try:
-                connection.ops.execute_sql_flush(database, sql_list)
+                connection.ops.execute_sql_flush(sql_list)
             except Exception as exc:
                 raise CommandError(
                     "Database %s couldn't be flushed. Possible reasons:\n"

django/db/backends/base/operations.py

@@ -400,9 +400,9 @@ class BaseDatabaseOperations:
         """
         raise NotImplementedError('subclasses of BaseDatabaseOperations must provide a sql_flush() method')
 
-    def execute_sql_flush(self, using, sql_list):
+    def execute_sql_flush(self, sql_list):
         """Execute a list of SQL statements to flush the database."""
-        with transaction.atomic(using=using, savepoint=self.connection.features.can_rollback_ddl):
+        with transaction.atomic(using=self.connection.alias, savepoint=self.connection.features.can_rollback_ddl):
             with self.connection.cursor() as cursor:
                 for sql in sql_list:
                     cursor.execute(sql)

tests/backends/base/test_operations.py

@@ -172,7 +172,7 @@ class SqlFlushTests(TransactionTestCase):
             reset_sequences=True,
             allow_cascade=True,
         )
-        connection.ops.execute_sql_flush(connection.alias, sql_list)
+        connection.ops.execute_sql_flush(sql_list)
 
         with transaction.atomic():
             self.assertIs(Author.objects.exists(), False)

tests/backends/tests.py

@@ -162,7 +162,7 @@ class LongNameTest(TransactionTestCase):
             VLM_m2m._meta.db_table,
         ]
         sql_list = connection.ops.sql_flush(no_style(), tables, reset_sequences=True)
-        connection.ops.execute_sql_flush(connection.alias, sql_list)
+        connection.ops.execute_sql_flush(sql_list)
 
 
 class SequenceResetTest(TestCase):