drop legacy puppet3 from travis matrix

Author: bastelfreak

.travis.yml

@@ -16,12 +16,6 @@ script: 'bundle exec rake validate && bundle exec rake lint && SPEC_OPTS="--form
 matrix:
   fast_finish: true
   include:
-    - rvm: 1.9.3
-      env: PUPPET_GEM_VERSION="~> 3.0"
-    - rvm: 2.1.5
-      env: PUPPET_GEM_VERSION="~> 3.0"
-    - rvm: 2.1.5
-      env: PUPPET_GEM_VERSION="~> 3.0" FUTURE_PARSER="yes"
     - rvm: 2.1.6
       env: PUPPET_GEM_VERSION="~> 4.0" STRICT_VARIABLES="yes"
     - rvm: 2.3.1