Bug 1598161 - remove 'os-release.orig'. r=egao

Differential Revision: https://phabricator.services.mozilla.com/D54058

--HG--
extra : moz-landing-system : lando

third_party/python/distro/tests/resources/distros/raspbian7/etc/os-release.orig

@@ -1,9 +0,0 @@
-PRETTY_NAME="Debian #OSNAME# 7 (wheezy)"
-NAME="Debian #OSNAME#"
-VERSION_ID="7"
-VERSION="7 (wheezy)"
-ID=debian
-ANSI_COLOR="1;31"
-HOME_URL="http://www.debian.org/"
-SUPPORT_URL="http://www.debian.org/support/"
-BUG_REPORT_URL="http://bugs.debian.org/"