[MM-10354] Add feature to remove team icon (#8684)

* set team.LastTeamIconUpdate to 0 when removing team icon

* add APIv4 for removing team icon

* removed comment and updated typo on AppError

i18n/en.json

@@ -2458,6 +2458,10 @@
     "id": "api.team.set_team_icon.encode.app_error",
     "translation": "Could not encode team icon"
   },
+  {
+    "id": "api.team.remove_team_icon.get_team.app_error",
+    "translation": "An error occurred getting the team"
+  },
   {
     "id": "api.team.set_team_icon.get_team.app_error",
     "translation": "An error occurred getting the team"
@@ -2482,6 +2486,10 @@
     "id": "api.team.set_team_icon.too_large.app_error",
     "translation": "Unable to upload team icon. File is too large."
   },
+  {
+    "id": "api.team.team_icon.update.app_error",
+    "translation": "An error occurred updating the team icon"
+  },
   {
     "id": "api.team.set_team_icon.write_file.app_error",
     "translation": "Could not save team icon"