Update from Weblate (#91)

* Deleted translation using Weblate (Japanese)

* Deleted translation using Weblate (Greek)

* Deleted translation using Weblate (Romanian)

* Deleted translation using Weblate (Polish)

resources/lang/el.lang.php

@@ -1,4 +0,0 @@
-<?php
-return [
-    'lang' => 'Greek',
-];

resources/lang/ja.lang.php

@@ -1,4 +0,0 @@
-<?php
-return [
-    'lang' => 'Japanese',
-];

resources/lang/pl.lang.php

@@ -1,4 +0,0 @@
-<?php
-return [
-    'lang' => 'Polish',
-];

resources/lang/ro.lang.php

@@ -1,4 +0,0 @@
-<?php
-return [
-    'lang' => 'Romanian',
-];