Update .travis.yml

Author: tkelman

.travis.yml

@@ -8,7 +8,3 @@ julia:
   - nightly
 notifications:
   email: false
-# uncomment the following lines to override the default test script
-#script:
-#  - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
-#  - julia -e 'Pkg.clone(pwd()); Pkg.build("StructIO"); Pkg.test("StructIO"; coverage=true)'