input/soup: plugin removed

This plugin is cumbersome to support, now that MPD is migrating away
from GLib and the GLib event loop.  It has no practical advantages
over the CURL plugin.  Soup requires the bloated GType library.

configure.ac

@@ -190,11 +190,6 @@ AC_ARG_ENABLE(curl,
 		[enable support for libcurl HTTP streaming (default: auto)]),,
 	[enable_curl=auto])
 
-AC_ARG_ENABLE(soup,
-	AS_HELP_STRING([--enable-soup],
-		[enable support for libsoup HTTP streaming (default: auto)]),,
-	[enable_soup=auto])
-
 AC_ARG_ENABLE(debug,
 	AS_HELP_STRING([--enable-debug],
 		[enable debugging (default: disabled)]),,
@@ -711,14 +706,6 @@ if test x$enable_curl = xyes; then
 fi
 AM_CONDITIONAL(ENABLE_CURL, test x$enable_curl = xyes)
 
-dnl ----------------------------------- SOUP ----------------------------------
-MPD_AUTO_PKG(soup, SOUP, [libsoup-2.4],
-	[libsoup HTTP streaming], [libsoup not found])
-if test x$enable_soup = xyes; then
-	AC_DEFINE(ENABLE_SOUP, 1, [Define when libsoup is used for HTTP streaming])
-fi
-AM_CONDITIONAL(ENABLE_SOUP, test x$enable_soup = xyes)
-
 dnl --------------------------------- Last.FM ---------------------------------
 if test x$enable_lastfm = xyes; then
 	if test x$enable_curl != xyes; then
@@ -1664,7 +1651,6 @@ results(lastfm,[Last.FM])
 results(soundcloud,[Soundcloud])
 printf '\n\t'
 results(mms,[MMS])
-results(soup, [SOUP])
 
 printf '\n\n##########################################\n\n'