Do not install libssh2 to avoid dynamically linking and requiring it

Author: mschenk42

.travis.yml

@@ -7,16 +7,7 @@ os:
 go:
   - 1.6
 
-addons:
-  apt:
-    packages:
-    - libssh2-1-dev
-
 before_install:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update;          fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install libssh2; fi
-  # - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then apt-get -qq update;               fi
-  # - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then apt-get install -y libssh2-1-dev; fi
   - go get -d github.com/libgit2/git2go
   - cd $GOPATH/src/github.com/libgit2/git2go
   - git checkout next