Don't save environment with the instance.

This neat trick does not work with all workflows, and some of the
functionality that uses it has already been changed or removed.

Let's reconsider this functionality after 0.7.

* examples/config-base.scm (envfile): Remove.
* create (prep_init_mount_point): Don't create config.env & co.

create

@@ -291,19 +291,6 @@ prep_init_mount_point(){
 	fi
     fi
 
-    # Create /etc/config.env on target with relevant environment
-    # variables, assuming that the value of the variables are
-    # correctly set, we therefore skip the quote for ease of parsing
-    # them back to our guix config.scm files.
-    TARGET_ETC="$TARGET_ROOT"/etc
-    mkdir -p "$TARGET_ETC" >&2
-    printf '%s\n' INSTANCE_NAME="$INSTANCE_NAME" > "$TARGET_ETC"/config.env
-    printf '%s\n' NIC_0_NETWORK_SUBNET="$NIC_0_NETWORK_SUBNET" >> "$TARGET_ETC"/config.env
-    printf '%s\n' NIC_0_NETWORK_GATEWAY="$NIC_0_NETWORK_GATEWAY" >> "$TARGET_ETC"/config.env
-    printf '%s\n' NIC_0_IP="$NIC_0_IP" >> "$TARGET_ETC"/config.env
-    printf '%s\n' FS_TYPE="$FS_TYPE" >> "$TARGET_ETC"/config.env
-    guix describe --format=json | "${JQ}" -r '"GUIX_COMMIT=" + .[].commit' >> "$TARGET_ETC"/config.env
-    cat "$(dirname "$(readlink -f "${GUIX_CONFIG}")")"/config-base.scm > "$TARGET_ETC"/config-base.scm
     printf "$TARGET_ROOT"
 }
 # guix system init on a target device's second partition

examples/config-base.scm

@@ -7,15 +7,6 @@
 (use-package-modules certs screen linux)
 (use-service-modules networking ssh sysctl)
 
-(let ((envfile (string-append (dirname (current-filename)) "/config.env")))
-  (if (file-exists? envfile)
-      (call-with-input-file envfile
-	(lambda (port)
-	  (let ((lines (get-string-all port)))
-	    (environ
-	     (append (delete "" (string-split lines #\newline))
-		     (environ))))))))
-
 (define (cidr->netmask address)
   "Convert a CIDR specification such as 10.0.0.0/24 to 255.255.255.0."
   (let ((mask (string->number (match (string-split address #\/)