Revert "Fixed #24369 -- Prevented crash when `flush`ing before db migration"

This reverts commit 9f1dbe29.
The proposed solution does not pass the test suite.

django/core/management/commands/flush.py

@@ -46,10 +46,6 @@ class Command(BaseCommand):
         sql_list = sql_flush(self.style, connection, only_django=True,
                              reset_sequences=reset_sequences,
                              allow_cascade=allow_cascade)
-        if not sql_list:
-            raise CommandError(
-                "No commands to proceed with, maybe the database is still empty?"
-            )
 
         if interactive:
             confirm = input("""You have requested a flush of the database.