Remove empty translation strings

src/assets/translations/si.json

@@ -1,11 +1,9 @@
 {
     "project": {
-        "name": "Convene",
-        "tag_line": ""
+        "name": "Convene"
     },
     "menu": {
         "ok": "හරි",
-        "done": "",
         "download": "බාගන්න",
         "edit": "සංස්කරණය",
         "reply": "පිලිතුර",
@@ -22,33 +20,12 @@
     "message": {
         "download_progress": "{percentage}% බාගත වී ඇත",
         "file_prefix": "ගොනුව: ",
-        "reply_image": "",
-        "reply_audio_message": "",
-        "reply_video": "",
-        "reply_poll": "",
-        "you": "ඔබ",
-        "outgoing_message_deleted_text": "",
-        "incoming_message_deleted_text": ""
+        "you": "ඔබ"
     },
     "login": {
-        "invalid_message": ""
     },
     "join": {
-        "title": "",
-        "title_user": "",
-        "user_name_label": "",
-        "remember_me": "",
-        "joining_as": "",
-        "join": "",
-        "join_user": "",
-        "enter_room": "",
-        "enter_room_user": "",
-        "status_logging_in": "",
-        "status_joining": "",
-        "join_failed": "",
-        "choose_name": ""
       },
     "logout": {
-        "confirm_text": ""
     }
 }