Refactor get_netbsd() to add create_vm() compatibility

quickget

@@ -1000,15 +1000,10 @@ function get_netboot() {
 
 function get_netbsd() {
     local HASH=""
-    local ISO=""
-    local URL=""
-
-    URL="https://cdn.netbsd.org/pub/NetBSD/NetBSD-${RELEASE}/images/"
-    ISO="NetBSD-${RELEASE}-amd64.iso"
+    local ISO="NetBSD-${RELEASE}-amd64.iso"
+    local URL="https://cdn.netbsd.org/pub/NetBSD/NetBSD-${RELEASE}/images/"
     HASH=$(wget -q -O- "${URL}/MD5" | grep "${ISO}" | cut -d' ' -f4)
-    web_get "${URL}/${ISO}" "${VM_PATH}"
-    check_hash "${ISO}" "${HASH}"
-    make_vm_config "${ISO}"
+    echo "${URL}/${ISO} ${HASH}"
 }
 
 function get_nixos() {