removing comments

Author: Peter Steinbach

.travis.yml

@@ -6,18 +6,6 @@ rvm:
 
 matrix:
   include:
-    # works on Precise and Trusty
-    # - os: linux
-    #   addons:
-    #     apt:
-    #       sources:
-    #         - ubuntu-toolchain-r-test
-    #       packages:
-    #         - g++-4.9
-    #   env:
-    #      - MATRIX_EVAL="CC=gcc-4.9 && CXX=g++-4.9"
-
-    # works on Precise and Trusty
     - os: linux
       addons:
         apt:
@@ -28,7 +16,6 @@ matrix:
       env:
          - MATRIX_EVAL="CC=gcc-5 && CXX=g++-5"
 
-    # works on Precise and Trusty
     - os: linux
       addons:
         apt: