Chore: Drops the LSIO option from bug report install types (#13961)

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -87,10 +87,8 @@ body:
       label: Installation method
       options:
         - Docker - official image
-        - Docker - linuxserver.io image
         - Bare metal
         - Other (please describe above)
-      description: Note there are significant differences from the official image and linuxserver.io, please check if your issue is specific to the third-party image.
     validations:
       required: true
   - type: textarea