LGTM fixes. Remove unused import and variables

powerdnsadmin/models/__init__.py

@@ -20,4 +20,4 @@ from .record_entry import RecordEntry
 
 def init_app(app):
     db.init_app(app)
-    _migrate = Migrate(app, db)
+    _migrate = Migrate(app, db)  # lgtm [py/unused-import]

powerdnsadmin/models/domain.py

@@ -287,7 +287,8 @@ class Domain(db.Model):
             account_id = None
         # add new domain
         d = Domain()
-        d.name = domain['name'].rstrip('.')
+        d.name = domain['name'].rstrip(
+            '.')  # lgtm [py/modification-of-default-value]
         d.master = str(domain['masters'])
         d.type = domain['kind']
         d.serial = domain['serial']

powerdnsadmin/models/server.py

@@ -3,7 +3,6 @@ from flask import current_app
 from urllib.parse import urljoin
 
 from ..lib import utils
-from .base import db
 from .setting import Setting
 
 

powerdnsadmin/models/setting.py

@@ -2,7 +2,6 @@ import sys
 import pytimeparse
 from ast import literal_eval
 from distutils.util import strtobool
-from distutils.version import StrictVersion
 
 from .base import db