Cleanup comments

Author: abitrolly

.travis.yml

@@ -34,7 +34,4 @@ matrix:
       script:
         # activate Emscripten
         - source ./emsdk/emsdk_env.sh
-        # no need to run cargo build anymore
-        # https://github.com/ethereumjs/rustbn.js/pull/36/files#r257229082
-        #- cargo build
         - make