fix PEP8 "E303 too many blank lines (2)"

fdroidserver/checkupdates.py

@@ -354,7 +354,6 @@ def main():
                                 common.getappname(app), version))
         return
 
-
     for app in apps:
 
         if options.autoonly and app['Auto Update Mode'] in ('None', 'Static'):

fdroidserver/metadata.py

@@ -272,7 +272,6 @@ class DescriptionFormatter:
                 self.ital = not self.ital
                 txt = txt[2:]
 
-
     def linkify(self, txt):
         linkified_plain = ''
         linkified_html = ''
@@ -805,7 +804,6 @@ def write_metadata(dest, app):
         mf.write('.\n')
         mf.write('\n')
 
-
     if app['Archive Policy']:
         writefield('Archive Policy')
     writefield('Auto Update Mode')

fdroidserver/update.py

@@ -840,7 +840,6 @@ def make_index(apps, apks, repodir, archive, categories):
     f.close()
 
 
-
 def archive_old_apks(apps, apks, archapks, repodir, archivedir, defaultkeepversions):
 
     for app in apps: