Remove custom Postgres class

Because PG > 10 is now supported by DBAL >= 2.6.0

app/config/config.yml

@@ -46,7 +46,6 @@ twig:
 doctrine:
     dbal:
         driver: "%database_driver%"
-        driver_class: "%database_driver_class%"
         host: "%database_host%"
         port: "%database_port%"
         dbname: "%database_name%"

app/config/config_test.yml

@@ -24,7 +24,6 @@ swiftmailer:
 doctrine:
     dbal:
         driver: "%test_database_driver%"
-        driver_class: "%test_database_driver_class%"
         host: "%test_database_host%"
         port: "%test_database_port%"
         dbname: "%test_database_name%"

app/config/parameters.yml.dist

@@ -11,8 +11,6 @@ parameters:
     # database_password: %env.database_password%
 
     database_driver: pdo_mysql
-    database_driver_class: ~
-    # database_driver_class: Wallabag\CoreBundle\Doctrine\DBAL\Driver\CustomPostgreSQLDriver
     database_host: 127.0.0.1
     database_port: ~
     database_name: wallabag

app/config/parameters_test.yml

@@ -8,4 +8,3 @@ parameters:
     test_database_path: "%env(TEST_DATABASE_PATH)%"
     env(TEST_DATABASE_PATH): "%kernel.project_dir%/data/db/wallabag_test.sqlite"
     test_database_charset: utf8
-    test_database_driver_class: ~

app/config/tests/parameters_test.mysql.yml

@@ -1,6 +1,5 @@
 parameters:
     test_database_driver: pdo_mysql
-    test_database_driver_class: ~
     test_database_host: localhost
     test_database_port: 3306
     test_database_name: wallabag_test

app/config/tests/parameters_test.pgsql.yml

@@ -1,6 +1,5 @@
 parameters:
     test_database_driver: pdo_pgsql
-    test_database_driver_class: Wallabag\CoreBundle\Doctrine\DBAL\Driver\CustomPostgreSQLDriver
     test_database_host: localhost
     test_database_port:
     test_database_name: wallabag_test

app/config/tests/parameters_test.sqlite.yml

@@ -1,6 +1,5 @@
 parameters:
     test_database_driver: pdo_sqlite
-    test_database_driver_class: ~
     test_database_host: localhost
     test_database_port:
     test_database_name: ~