Check removing explicit libgdal1h

package installation does not fail now but postgis is not available

.travis.yml

@@ -38,11 +38,12 @@ before_install:
   - sudo apt-get -y remove --purge postgis
   - sudo apt-get -y autoremove
 
+  # - sudo apt-get -y install libgdal1h=1.11.0-0cdb1~precise3
   - sudo apt-get -y install postgresql-9.5=9.5.2-2ubuntu1
   - sudo apt-get -y install postgresql-server-dev-9.5=9.5.2-2ubuntu1
   - sudo apt-get -y install postgresql-plpython-9.5=9.5.2-2ubuntu1
-  - sudo apt-get -y install postgresql-9.5-postgis-2.2=2.2.2.0-cdb2
   - sudo apt-get -y install postgresql-9.5-postgis-scripts=2.2.2.0-cdb2
+  - sudo apt-get -y install postgresql-9.5-postgis-2.2=2.2.2.0-cdb2
 
   # configure it to accept local connections from postgres
   - echo -e "# TYPE  DATABASE        USER            ADDRESS                 METHOD \nlocal   all             postgres                                trust\nlocal   all             all                                     trust\nhost    all             all             127.0.0.1/32            trust" \

src/pg/sql/17_weighted_median.sql

@@ -1,33 +0,0 @@
-CREATE OR REPLACE FUNCTION CDB_WeightedMedianCenter(geoms geometry[], vals numeric[])
-RETURNS geometry(Point, 4326)
-AS $$
-DECLARE
-  i INT;
-  median_val numeric;
-  median_index INT;
-BEGIN
-
-  -- find the median value
-  SELECT percentile_disc(0.5) WITHIN GROUP (ORDER BY v) INTO median_val
-    FROM unnest(vals) As x(v);
-
-  -- find the index of the median value
-  FOR i in 1..array_length(vals, 1)
-  LOOP
-    IF vals[i] < median_val
-    THEN
-      median_index := i;
-      EXIT;
-    END IF;
-  END LOOP;
-
-  -- return the geometry that has the median value of the dataset
-  IF ST_GeometryType(geoms[median_index]) <> 'ST_Point'
-  THEN
-    RETURN ST_Centroid(geoms[median_index]);
-  ELSE
-    RETURN geoms[median_index];
-  END IF;
-
-END;
-$$ LANGUAGE plpgsql;