Remove OS X from tests, seems incompatible

Opened #24 for when
contributors want to do it.

.travis.yml

@@ -1,9 +1,7 @@
 language: shell # (unofficial)
+distro: trusty
 sudo: false
 
-os:
-  - linux
-  - osx
 env:
   # outdated/legacy
   - TEST_SHELL=sh BORG=1.0.2 BORG_SOURCE=binary # old, Ubuntu Xenial
@@ -18,12 +16,6 @@ before_script:
   # add custom binary path
   - mkdir "$PWD/custombin/"
   - export PATH="$PWD/custombin/:$PATH"
-  # install packages on OS X
-  # - 'if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update; fi' # disabled, as packages may already be there
-  - 'if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install shellcheck zsh; brew upgrade gpg; alias gpg="gpg2"; fi'
-  # set correct binary variant
-  - 'if [ "$TRAVIS_OS_NAME" = "osx" ]; then export BORG_VARIANT=borg-macosx64; fi'
-  - 'if [ "$TRAVIS_OS_NAME" = "linux" ]; then export BORG_VARIANT=borg-linux64; fi'
   # installing borg
   - tests/helper/installBorg.sh
   # install shunit2

tests/unitTests/borgcronStarter.sh

@@ -85,7 +85,6 @@ testExecuteSingleConfigExplicit(){
 	# do specify config to run explicitly
 	addConfigFile "singleConfig.sh"
 
-	$TEST_SHELL "$BASE_DIR/borgcron_starter.sh" singleConfig
 	assertTrue "no error when executing" \
 				"$TEST_SHELL '$BASE_DIR/borgcron_starter.sh' singleConfig"