po: Remove call display files

The call display was removed in !425 and this should've been part of edd85602.

po/POTFILES.in

@@ -4,7 +4,6 @@ plugins/sip/sip-account-widget.ui
 src/calls-application.c
 src/calls-best-match.c
 src/calls-call.c
-src/calls-call-display.c
 src/calls-call-record.c
 src/calls-call-record-row.c
 src/calls-call-selector-item.c
@@ -26,7 +25,6 @@ src/calls-record-store.c
 src/calls-ringer.c
 src/main.c
 src/ui/account-overview.ui
-src/ui/call-display.ui
 src/ui/call-record-row.ui
 src/ui/call-selector-item.ui
 src/ui/call-window.ui