Remove +1 stripping from numbers in modem scripts

Note prefix stripping was unreliable because any +1XX number would break things.
The advice should be to always dial with +1 / international prefixes and store
contacts in your contacts.tsv with international codes; this way we avoid any
duplicate errors since we can be assured things in mmcli always come back w/
international prefixing automatically.

scripts/modem/sxmo_modemcall.sh

@@ -34,9 +34,7 @@ vid_to_number() {
 	mmcli -m "$(modem_n)" -o "$1" -K | 
 	grep call.properties.number | 
 	cut -d ':' -f2 | 
-	tr -d  ' ' | 
-	sed 's/^[+]//' |
-	sed 's/^1//'
+	tr -d  ' '
 }
 
 log_event() {