Remove 'disableip6' field from API response (#9218)

Removed empty 'disableip6' field from API response.

Author: michelroegl-brunner

misc/api.func

@@ -30,7 +30,6 @@ post_to_api() {
     "ram_size": $RAM_SIZE,
     "os_type": "$var_os",
     "os_version": "$var_version",
-    "disableip6": "",
     "nsapp": "$NSAPP",
     "method": "$METHOD",
     "pve_version": "$pve_version",
@@ -81,7 +80,6 @@ post_to_api_vm() {
     "ram_size": $RAM_SIZE,
     "os_type": "$var_os",
     "os_version": "$var_version",
-    "disableip6": "",
     "nsapp": "$NSAPP",
     "method": "$METHOD",
     "pve_version": "$pve_version",