[infra] Improve bug template for reproductions

Same as mui/material-ui#44198

Author: oliviertassinari

.github/ISSUE_TEMPLATE/1.bug.yml

@@ -26,8 +26,6 @@ body:
       description: |
         **⚠️ Issues that we can't reproduce can't be fixed.**
       value: |
-        Link to live example:
-
         Steps:
         1.
         2.