GRMLBASE/80-initramfs: no longer set CRYPTSETUP=y

Quoting from cryptsetup's Debian packaging git:

| commit 06f8c00c908ffd1fa95c4afc78e9cac462d01d91
| Author: Guilhem Moulin <guilhem@debian.org>
| Date:   Sat Jul 20 19:18:21 2019 -0300
|
|     initramfs: Remove compatibility warnings regarding CRYPTSETUP=[y|n].
|
|     The warning was added in 2:2.0.3-1 for the ‘cryptsetup’ package split
|     into ‘cryptsetup-run’ and ‘cryptsetup-initramfs’.  With the recent
|     Buster release we can now move on: cryptsetup is always copied to the
|     initramfs when the ‘cryptsetup-initramfs’ package is installed.

Given that we have the cryptsetup-initramfs package in GRMLBASE,
we no longer need to use this.

Closes: grml/grml#82

etc/grml/fai/config/scripts/GRMLBASE/80-initramfs

@@ -20,8 +20,8 @@ fi
 echo "Rebuilding initramfs"
 
 for initrd in "$(basename $target/boot/vmlinuz-*)" ; do
-    if ! CRYPTSETUP=y $ROOTCMD update-initramfs -k "${initrd##vmlinuz-}" -c ; then
-        echo "Creating fresh initrd did not work, trying update instead:"
-        CRYPTSETUP=y $ROOTCMD update-initramfs -k "${initrd##vmlinuz-}" -u
+    if ! $ROOTCMD update-initramfs -k "${initrd##vmlinuz-}" -c ; then
+        echo "Creating fresh initramfs did not work, trying update instead:"
+        $ROOTCMD update-initramfs -k "${initrd##vmlinuz-}" -u
     fi
 done