TT#49467 Remove DEFAULT_INTERNAL_NETMASK option

The option INTERNAL_NETMASK is set to either passed parameter
ngcpnetmask or to DEFAULT_INTERNAL_NETMASK value so there is no sense to
pass this variable to ngcp-initial-configuration.

Change-Id: I9d5f4aa72534286b7a2db9d28db42435eaf49fb3

templates/scripts/includes/deployment.sh

@@ -1575,10 +1575,6 @@ TARGET_HOSTNAME="${TARGET_HOSTNAME}"
 DEFAULT_INSTALL_DEV="${INSTALL_DEV}"
 INTERNAL_DEV="${INTERNAL_DEV}"
 NETWORK_DEVICES="${NETWORK_DEVICES}"
-DEFAULT_INTERNAL_NETMASK="${DEFAULT_INTERNAL_NETMASK}"
-# I would like to delete ${DEFAULT_INTERNAL_NETMASK} and use ${INTERNAL_NETMASK} into installer,
-# Lets test we have INTERNAL_NETMASK==DEFAULT_INTERNAL_NETMASK for CE/PRO/Carrier (in installer)
-# and switch code to INTERNAL_NETMASK then.
 INTERNAL_NETMASK="${INTERNAL_NETMASK}"
 MANAGEMENT_IP="${MANAGEMENT_IP}"
 NGCP_PXE_INSTALL="${NGCP_PXE_INSTALL}"