Use default Docker version on Travis CI instead of manual install

PeterDaveHello · PeterDaveHello · commit d160712addda · 2018-06-10T00:35:33.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,10 +7,6 @@ language: generic
 
 services:
     - docker
-addons:
-  apt:
-    packages:
-      - docker-ce
 
 script: ./test-build.sh $NODE_VERSION $VARIANT
 
diff --git a/travis.yml.template b/travis.yml.template
@@ -5,10 +5,6 @@ language: generic
 
 services:
     - docker
-addons:
-  apt:
-    packages:
-      - docker-ce
 
 script: ./test-build.sh $NODE_VERSION $VARIANT
 
