test customized drone plugin

.drone.yml

@@ -7,17 +7,6 @@ steps:
   - name: show env
     image: prlab/drone_plugin    
     commands:
-      - echo "DRONE_GIT_HTTP_URL = ${DRONE_GIT_HTTP_URL}"
-      - echo "DRONE_GIT_SSH_URL = ${DRONE_GIT_SSH_URL}"
-      - echo "DRONE_PULL_REQUEST = ${DRONE_PULL_REQUEST}"
-      - echo "DRONE_REMOTE_URL = ${DRONE_REMOTE_URL}"
-      - echo "DRONE_REPO = ${DRONE_REPO}"
-      - echo "DRONE_REPO_BRANCH = ${DRONE_REPO_BRANCH}"
-      - echo "DRONE_REPO_LINK = ${DRONE_REPO_LINK}"
-      - echo "DRONE_REPO_NAME = ${DRONE_REPO_NAME}"
-      - echo "DRONE_SEMVER = ${DRONE_SEMVER}"
-      - echo "DRONE_TAG = ${DRONE_TAG}"
-      - echo "DRONE_TARGET_BRANCH = ${DRONE_TARGET_BRANCH}"
       - echo $(python3 /plugin/main.py)
     settings:
       host: