[AIRFLOW-4256] Remove noqa from migrations (apache#5055)

airflow/migrations/versions/05f30312d566_merge_heads.py

@@ -1,15 +1,13 @@
-# flake8: noqa
-#
 # Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
 # regarding copyright ownership.  The ASF licenses this file
 # to you under the Apache License, Version 2.0 (the
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
-# 
+#
 #   http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

airflow/migrations/versions/0a2a5b66e19d_add_task_reschedule_table.py

@@ -1,5 +1,3 @@
-# flake8: noqa
-#
 # Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
@@ -24,33 +22,35 @@
 Create Date: 2018-06-17 22:50:00.053620
 
 """
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
 
 # revision identifiers, used by Alembic.
 revision = '0a2a5b66e19d'
 down_revision = '9635ae0956e7'
 branch_labels = None
 depends_on = None
 
-from alembic import op
-import sqlalchemy as sa
-from sqlalchemy.dialects import mysql
-
-
 TABLE_NAME = 'task_reschedule'
 INDEX_NAME = 'idx_' + TABLE_NAME + '_dag_task_date'
 
+
 # For Microsoft SQL Server, TIMESTAMP is a row-id type,
 # having nothing to do with date-time.  DateTime() will
 # be sufficient.
 def mssql_timestamp():
     return sa.DateTime()
 
+
 def mysql_timestamp():
     return mysql.TIMESTAMP(fsp=6)
 
+
 def sa_timestamp():
     return sa.TIMESTAMP(timezone=True)
 
+
 def upgrade():
     # See 0e2a74e0fc9f_add_time_zone_awareness
     conn = op.get_bind()
@@ -74,9 +74,10 @@ def upgrade():
         sa.Column('duration', sa.Integer(), nullable=False),
         sa.Column('reschedule_date', timestamp(), nullable=False),
         sa.PrimaryKeyConstraint('id'),
-        sa.ForeignKeyConstraint(['task_id', 'dag_id', 'execution_date'],
-                                ['task_instance.task_id', 'task_instance.dag_id','task_instance.execution_date'],
-                                name='task_reschedule_dag_task_date_fkey')
+        sa.ForeignKeyConstraint(
+            ['task_id', 'dag_id', 'execution_date'],
+            ['task_instance.task_id', 'task_instance.dag_id', 'task_instance.execution_date'],
+            name='task_reschedule_dag_task_date_fkey')
     )
     op.create_index(
         INDEX_NAME,