Fix config.py

.travis.yml

@@ -9,7 +9,6 @@ matrix:
   include:
     - language: python
       python:
-        - "3.5"
         - "3.6"
       before_install:
         - sudo apt-get -y install software-properties-common

server/szurubooru/config.py

@@ -23,7 +23,7 @@ def docker_config() -> Dict:
             'POSTGRES_HOST',
             'ESEARCH_HOST'
     ]:
-        if not os.getenv(key, False) and os.getenv('CI') != 'true':
+        if not os.getenv(key, False):
             raise errors.ConfigError(f'Environment variable "{key}" not set')
     return {
         'debug': True,