Revert "selftests: revocable: Add kselftest cases"

This reverts commit 9d4502f.

The new revocable functionality is fundamentally broken and at a minimum
needs to be redesigned.

Drop the revocable selftests to allow the implementation to be reverted.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260204142849.22055-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jhovold

MAINTAINERS

@@ -22392,7 +22392,6 @@ S:	Maintained
 F:	drivers/base/revocable.c
 F:	drivers/base/revocable_test.c
 F:	include/linux/revocable.h
-F:	tools/testing/selftests/drivers/base/revocable/
 
 RFKILL
 M:	Johannes Berg <johannes@sipsolutions.net>