Revert "Unbound: Compile with systemd support"

This reverts commit 5876741.

Unbound expects at least systemd 209 with libsystemd. Currently systemd
27 is installed, so the check fails.

```
checking for SYSTEMD... no
checking for SYSTEMD_DAEMON... no
```

unbound.be0

@@ -53,10 +53,9 @@ SRCURL[0]="https://www.unbound.net/downloads/unbound-${PKGVERSION}.tar.gz"
 #    bee_patch "${@}"
 #}
 
-mee_configure() {
-    bee_configure \
-        --enable-systemd
-}
+#mee_configure() {
+#    bee_configure
+#}
 
 #mee_build() {
 #    bee_build