Drop PHP 7.1 test

Signed-off-by: Benedikt Geissler <benedikt@g5r.eu>

.drone.yml

@@ -219,15 +219,6 @@ pipeline:
       matrix:
         DB: postgres
         PHP: 7.0
-  postgres-php7.1:
-    image: nextcloudci/php7.1:php7.1-12
-    commands:
-      - sleep 10 # gives the database enough time to initialize
-      - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh pgsql
-    when:
-      matrix:
-        DB: postgres
-        PHP: 7.1
   mysqlmb4-php5.6:
     image: nextcloudci/php5.6:php5.6-7
     commands:
@@ -592,9 +583,6 @@ matrix:
     - DB: postgres
       PHP: 7.0
       ENABLE_REDIS: true
-    - DB: postgres
-      PHP: 7.1
-      ENABLE_REDIS: true
     - DB: mysqlmb4
       PHP: 5.6
       ENABLE_REDIS: true