MT#9307 Drop broken invoice-gen files

This is handled via templates packages already, see MT#5879

(cherry picked from commit 06de6c6653363a21d8292c35df84e54698744bea)

etc/invoice-gen.conf

@@ -1,15 +0,0 @@
-[% TAGS [- -] %]
-DBHOST=[% database.dbhost %]
-DBPORT=[% database.dbport %]
-DBDB=[% invoicegen.dbname %]
-DBUSER=[% invoicegen.dbuser %]
-DBPASS=[% invoicegen.dbpassword %]
-
-RESELLER_ID=[% invoicegen.reseller_id %]
-CLIENT_CONTRACT_ID=[% invoicegen.customer_contract_id %]
-#STIME=[% invoicegen.stime %]
-#ETIME=[% invoicegen.etime %]
-SEND=[% invoicegen.send %]
-RESEND=[% invoicegen.resend %]
-REGENERATE=[% invoicegen.regenerate %]
-ALLOW_TERMINATED=[% invoicegen.allow_terminated %]

etc/invoice-gen.cron

@@ -1,8 +0,0 @@
-[% TAGS [- -] %]
-[- IF PRO -]
-5  3 1 * *   root    if ! /usr/sbin/ngcp-check_active -q; then perl /usr/share/ngcp-panel-tools/generate_invoice.pl --prevmonth 2>&1 >/dev/null; fi
-5  3 2 * *   root    if ! /usr/sbin/ngcp-check_active -q; then perl /usr/share/ngcp-panel-tools/generate_invoice.pl --prevmonth --sendonly 2>&1 >/dev/null; fi
-[- ELSE -]
-5  3 1 * *   root    perl /usr/share/ngcp-panel-tools/generate_invoice.pl --prevmonth 2>&1 >/dev/null
-5  3 2 * *   root    perl /usr/share/ngcp-panel-tools/generate_invoice.pl --prevmonth --sendonly 2>&1 >/dev/null
-[- END -]