Revert "travis: install dependencies in a restricted way"

This reverts commit f585023.

.travis.yml

@@ -31,7 +31,4 @@ addons:
             - libncurses5-dev
             - libjson0-dev
             - libmemcache-dev
-before_install:
-    - sudo apt-get update -qq
-    - sudo apt-get install -y libsqlite3-dev libsctp-dev libradiusclient-ng-dev libhiredis-dev unixodbc-dev libconfuse-dev libmysqlclient-dev libexpat1-dev libxml2-dev libpq-dev flex bison zlib1g-dev libperl-dev libsnmp-dev libdb-dev libldap2-dev libcurl4-gnutls-dev libgeoip-dev libpcre3-dev libmemcached-dev libmicrohttpd-dev librabbitmq-dev liblua5.1-dev libncurses5-dev libjson0-dev libmemcache-dev
-script: FASTER=1 make -j exclude_modules="db_oracle osp sngtc cachedb_cassandra cachedb_couchbase cachedb_mongodb" all
+script: make exclude_modules="db_oracle osp sngtc cachedb_cassandra cachedb_couchbase cachedb_mongodb" all