Disable is_geos? tests
Disable is_geos? tests

Not sure what the point of that method is, or if it’s this adapter’s
reponsibiliy. The tests fail on Travis & work locally.

IBazylchuk/activerecord-postgis-adapter,dzjuck/activerecord-postgis-adapter,ericcj/activerecord-postgis-adapter,amitree/activerecord-postgis-adapter