Revert "Testing CircleCI with custom postgres env"

This reverts commit a36299f0df.

.circleci/config.yml

@@ -3,17 +3,6 @@
 # Check https://circleci.com/docs/2.0/language-python/ for more details
 #
 version: 2
-
-services:
-  postgres:
-    image: circleci/postgres:9.4
-    environment:
-      POSTGRES_PASSWORD: totallyHacked1337
-      POSTGRES_USER: imagehost
-      POSTGRES_DB: imagehost_db
-    ports:
-      - '5432:5432'
-
 jobs:
   build:
     docker:
@@ -24,7 +13,7 @@ jobs:
       # Specify service dependencies here if necessary
       # CircleCI maintains a library of pre-built images
       # documented at https://circleci.com/docs/2.0/circleci-images/
-      - image: postgres
+      - image: circleci/postgres:9.4
 
     working_directory: ~/repo