remove umask changes since these are causing issues are are not needed anymore

thanks to home folder permission lockdown

https://forums.whonix.org/t/change-default-umask/7416/45

usr/share/pam-configs/mkhomedir-security-misc

@@ -4,4 +4,4 @@ Priority: 100
 Session-Type: Additional
 Session-Interactive-Only: yes
 Session:
-	optional	pam_mkhomedir.so umask=027
+	optional	pam_mkhomedir.so

usr/share/pam-configs/usergroups-security-misc

@@ -1,6 +0,0 @@
-Name: change default umask to 027 (by package security-misc)
-Default: yes
-Priority: 256
-Session-Type: Additional
-Session:
-	optional	pam_umask.so	usergroups umask=027