update pipeline for master branch

.drone.yml

@@ -10,14 +10,13 @@ volumes:
   - name: cache 
     host:
       path: /tmp/cache
-      
 steps:
 - name: build
   image: python:3
   commands:
     - echo **start**
     - pip install -r requirements.txt
-
+    
 - name: test
   image: python:3
   commands: