Update translation files

Updated by "Cleanup translation files" hook in OSGeo Weblate.

Translation: GTT Project/Redmine GTT core plugin
Translate-URL: https://weblate.osgeo.org/projects/gtt-project/redmine_gtt/

Author: weblate

config/locales/ja.yml

@@ -33,7 +33,6 @@ ja:
   label_tab_geocoder: "ジオコーダ"
   geocoder_options: "ジオコーダのオプション"
 
-  gtt_tile_sources_select_osm: "OpenStreetMap"
   gtt_tile_sources_load_example: "サンプル設定をロード。"
 
   gtt_settings_general_center_lon: "既定の地図中心経度"