Remove email docker login parameter

Flag --email has been deprecated, will be removed in 1.13.

Author: itskingori

circle.yml

@@ -17,6 +17,6 @@ deployment:
   tagged:
     tag: /.*/
     commands:
-      - docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
+      - docker login -u $DOCKER_USER -p $DOCKER_PASS
       - docker tag $IMAGE_NAME $IMAGE_NAME:$CIRCLE_TAG
       - docker push $IMAGE_NAME:$CIRCLE_TAG