pgroonga: Remove now-unnecessary 'GRANT USAGE' statement.

This was only necessary for PGroonga 1.x, and the `pgroonga` schema
will most likely be removed at some point inthe future, which will
make this statement error out.

Drop the unnecessary statement.

puppet/zulip/manifests/postgresql_base.pp

@@ -89,20 +89,10 @@ class zulip::postgresql_base {
     }
 
     $dbname = zulipconf('postgresql', 'database_name', 'zulip')
-    $dbuser = zulipconf('postgresql', 'database_user', 'zulip')
-    file { $pgroonga_setup_sql_path:
-      ensure  => file,
-      require => Package["${postgresql}-pgdg-pgroonga"],
-      owner   => 'postgres',
-      group   => 'postgres',
-      mode    => '0640',
-      content => template('zulip/postgresql/pgroonga_setup.sql.template.erb'),
-    }
-
     exec{'create_pgroonga_extension':
-      require => File[$pgroonga_setup_sql_path],
+      require => Package["${postgresql}-pgdg-pgroonga"],
       # lint:ignore:140chars
-      command => "bash -c 'cat ${pgroonga_setup_sql_path} | su postgres -c \"psql -v ON_ERROR_STOP=1 ${dbname}\" && touch ${pgroonga_setup_sql_path}.applied'",
+      command => "bash -c 'echo \"CREATE EXTENSION PGROONGA\" | su postgres -c \"psql -v ON_ERROR_STOP=1 ${dbname}\" && touch ${pgroonga_setup_sql_path}.applied'",
       # lint:endignore
       creates => "${pgroonga_setup_sql_path}.applied",
     }

puppet/zulip/templates/postgresql/pgroonga_setup.sql.template.erb

@@ -1,2 +0,0 @@
-CREATE EXTENSION PGROONGA;
-GRANT USAGE ON SCHEMA pgroonga TO <%= @dbuser %>;

scripts/setup/create-pgroonga.sql

@@ -1,3 +1,2 @@
 \connect zulip
 CREATE EXTENSION pgroonga;
-GRANT USAGE ON SCHEMA pgroonga TO zulip;

tools/setup/postgresql-init-dev-db

@@ -116,8 +116,6 @@ SELECT unnest(
         ARRAY['ALTER SYSTEM SET pgroonga.enable_wal = ''on''', 'SELECT pg_reload_conf()']
     END
 ) \gexec
-
-GRANT USAGE ON SCHEMA pgroonga TO $USERNAME;
 EOF
 
 psql -v ON_ERROR_STOP=1 -e -h localhost postgres "$USERNAME" <<EOF