travis: use stable NetSNMP from Homebrew

The devel version is not here anymore and the stable one has been
upgraded to 5.7.3.

diff --git a/.travis/install.sh b/.travis/install.sh
index 078ecaa4644e0f57a5aaaf9f2e773514b8d60d19..78f43735d0b0fe17fa36ee7c19044f409224b36a 100755 (executable)
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -20,8 +20,7 @@ case "$(uname -s)" in
     Darwin)
         # OS X
         brew update
-        brew install libevent jansson libxml2 check
-        brew install net-snmp --devel
+        brew install libevent jansson libxml2 check net-snmp
         ;;
     *)
         # Linux