travis: on mac, don't install openssl or libidn

- openssl is already installed and causes warnings when trying to
  install again

- libidn isn't used these days, and homebrew doesn't seem to have a
  libidn2 package to replace with easily

Closes #1895

diff --git a/.travis.yml b/.travis.yml
index 82e3edb7adc4521af63db91ba11592139731b436..541628d99f1c1b34f6295cee7f649eb178723991 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -81,7 +81,7 @@ install:
   - pip install --user cpp-coveralls
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update > /dev/null; fi
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew reinstall libtool > /dev/null; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install openssl libidn rtmpdump libssh2 c-ares libmetalink libressl nghttp2 libmetalink; fi
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install rtmpdump libssh2 c-ares libmetalink libressl nghttp2 libmetalink; fi
   - if [ $TRAVIS_OS_NAME = linux ]; then
       curl -L https://github.com/nghttp2/nghttp2/releases/download/v1.24.0/nghttp2-1.24.0.tar.gz |
          tar xzf - &&