Resolve flake8 warnings

src/pretix/plugins/ticketoutputpdf/__init__.py

@@ -22,7 +22,7 @@ class TicketOutputPdfApp(AppConfig):
     def compatibility_errors(self):
         errs = []
         try:
-            import reportlab
+            import reportlab  # NOQA
         except ImportError:
             errs.append("Python package 'reportlab' is not installed.")
         return errs

src/pretix/plugins/ticketoutputpdf/ticketoutput.py

@@ -1,13 +1,9 @@
 from io import BytesIO
 import logging
-from django.contrib import messages
+
 from django.contrib.staticfiles import finders
 from django.http import HttpResponse
-from django.shortcuts import redirect
-from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
-from pretix.base.models import Order
-
 from pretix.base.ticketoutput import BaseTicketOutput
 
 
@@ -15,7 +11,6 @@ logger = logging.getLogger('pretix.plugins.ticketoutputpdf')
 
 
 class PdfTicketOutput(BaseTicketOutput):
-
     identifier = 'pdf'
     verbose_name = _('PDF output')
     download_button_text = _('Download PDF')