Stop testing PostGIS

Travis fails to install that

.travis.yml

@@ -5,13 +5,13 @@ services:
   - redis
   - postgresql
   - mysql
-addons:
-  postgresql: "10"
-  apt:
-    packages:
-    - postgresql-10
-    - postgresql-10-postgis-2.4
-    - libgdal-dev
+# addons:
+#   postgresql: "10"
+#   apt:
+#     packages:
+#     - postgresql-10
+#     - postgresql-10-postgis-2.4
+#     - libgdal-dev
 
 python:
   - 3.5
@@ -43,9 +43,9 @@ install:
   - pip install tox-travis
 before_script:
   # check gis
-  - gdal-config --version
-  - gdal-config --cflags
-  - psql -U postgres -c "create extension postgis"
+  # - gdal-config --version
+  # - gdal-config --cflags
+  # - psql -U postgres -c "create extension postgis"
   # set up postgresql
   - psql -U postgres -c "create role cacheops login superuser"
   # postgis django backend requires these to exist
@@ -57,4 +57,5 @@ before_script:
   - mysql -e "create database cacheops"
   - mysql -e "create database cacheops_slave"
 script:
-  - GDAL_VERSION=`gdal-config --version` tox
+  # - GDAL_VERSION=`gdal-config --version` tox
+  - tox

tox.ini

@@ -30,7 +30,7 @@ deps =
     djmaster: git+https://github.com/django/django
     mysqlclient
     py{35,36,37,38}: psycopg2
-    gdal=={env:GDAL_VERSION:2.4}
+    ; gdal=={env:GDAL_VERSION:2.4}
     pypy3: psycopg2cffi>=2.7.6
     before_after==1.0.0
     jinja2>=2.10
@@ -40,7 +40,7 @@ commands =
     env CACHEOPS_LRU=1 ./run_tests.py []
     env CACHEOPS_DB=mysql ./run_tests.py []
     env CACHEOPS_DB=postgresql ./run_tests.py []
-    env CACHEOPS_DB=postgis ./run_tests.py []
+    ; env CACHEOPS_DB=postgis ./run_tests.py []
     ; Test invalidate command
     ./manage.py invalidate tests.post
     ./manage.py invalidate tests