travis: don't install libevent and net-snmp on OSX

They seem to be already present in Travis environment.

diff --git a/tests/ci/install.sh b/tests/ci/install.sh
index 3da09c6f1f39ee6f9f1335ba58061d88e7f54a9b..44cc741a616e76a74855888f397e5249f6dc027c 100755 (executable)
--- a/tests/ci/install.sh
+++ b/tests/ci/install.sh
@@ -8,7 +8,7 @@ case "$(uname -s)" in
         # Workaround a bug in Travis:
         # https://github.com/Homebrew/legacy-homebrew/issues/43874
         brew uninstall libtool
-        brew install libtool libevent jansson libxml2 check net-snmp
+        brew install libtool jansson libxml2 check
         ;;
     Linux)
         # We prefer gcc-5