ubus-lime-groundrouting: stop depending on luci-compat

[ilario]

As noted in #1187 (comment), installing lime-app pulls a lot of dependencies, including luci-base.

This happens because lime-app depends on ubus-lime-groundrouting which depends on luci-compat which depends on luci-lua-runtime which depends on luci-base.

The dependency from luci-compat has been introduced here: 5792740 for having a library whose import has been added here: badd3f2

lime-packages/packages/ubus-lime-groundrouting/files/usr/libexec/rpcd/lime-groundrouting

Line 14 in badd3f2

local ntm = require "luci.model.network".init()

Does anyone know whether that row is needed or not?
The import ntm is declared but not used.
Still, the line "luci.model.network".init() maybe does something?