security/yama: Remove unnecessary selects from Kconfig.

Yama selects SECURITYFS and SECURITY_PATH, but requires neither.
Remove them.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Kees Cook <keescook@chromium.org>

security/yama/Kconfig

 config SECURITY_YAMA
 	bool "Yama support"
 	depends on SECURITY
-	select SECURITYFS
-	select SECURITY_PATH
 	default n
 	help
 	  This selects Yama, which extends DAC support with additional