Update .travis.yml

.travis.yml

@@ -27,7 +27,7 @@ install:
 before_script:
     - URL=https://github.com/${REPO}
     - echo ; echo -n "flake8 testing of ${URL} on " ; python -V
-    - git clone --depth=50 ${URL} ~/${REPO}  # --branch=master
+    # - git clone --depth=50 ${URL} ~/${REPO}  # --branch=master
     - cd ~/${REPO}
 script:
     - echo stop the build if there are Python syntax errors or undefined names