Bug 1478438 - Delete unused confvars entries on Android r=nalexander

Differential Revision: https://phabricator.services.mozilla.com/D31421

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

mobile/android/confvars.sh

@@ -30,9 +30,6 @@ MOZ_ANDROID_BROWSER_INTENT_CLASS=org.mozilla.gecko.BrowserApp
 
 MOZ_NO_SMART_CARDS=1
 
-MOZ_XULRUNNER=
-
-MOZ_CAPTURE=1
 MOZ_RAW=1
 
 # use custom widget for html:select

old-configure.in

@@ -1724,10 +1724,6 @@ case "$MOZ_BUILD_APP" in
 browser)
   AC_DEFINE(MOZ_PHOENIX)
   ;;
-
-xulrunner)
-  AC_DEFINE(MOZ_XULRUNNER)
-  ;;
 esac
 
 # Graphene is a desktop runtime for running applications with a HTML UI.
@@ -1736,7 +1732,6 @@ if test -n "$MOZ_GRAPHENE"; then
 fi
 
 AC_SUBST(MOZ_PHOENIX)
-AC_SUBST(MOZ_XULRUNNER)
 
 dnl ========================================================
 dnl Ensure Android SDK and build-tools versions depending on