ima: efi: Drop unnecessary check for CONFIG_MODULE_SIG/CONFIG_KEXEC_SIG

ima: efi: Drop unnecessary check for CONFIG_MODULE_SIG/CONFIG_KEXEC_SIG

When configuration settings are disabled the guarded functions are
defined as empty stubs, so the check is unnecessary.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Reviewed-by: Aaron Tomlin <atomlin@atomlin.com>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
[zohar@linux.ibm.com: fixed merge conflict with commit 63e8a44395a4]
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>