[Fixes #11920] Remove call to command rebuild_index in tasks.py (#14304) (#14317)

(cherry picked from commit 77f4f51)

Co-authored-by: Emanuele Tajariol <etj@geo-solutions.it>

Author: github-actions[bot]

tasks.py

@@ -294,13 +294,6 @@ def migrations(ctx):
         f"python manage.py migrate --noinput --settings={_localsettings()} --database=datastore",
         pty=True,
     )
-    try:
-        ctx.run(
-            f"python manage.py rebuild_index --noinput --settings={_localsettings()}",
-            pty=True,
-        )
-    except Exception:
-        pass
 
 
 @task