input/lastfm: removed obsolete last.fm input plugin

This has been replaced by the last.fm playlist plugin.  The input
plugin has never worked well, and was just a playground to experiment
with the last.fm radio protocol.

src/input_stream.c

@@ -31,8 +31,6 @@
 #include "input/curl_input_plugin.h"
 #endif
 
-#include "input/lastfm_input_plugin.h"
-
 #ifdef ENABLE_MMS
 #include "input/mms_input_plugin.h"
 #endif
@@ -49,9 +47,6 @@ static const struct input_plugin *const input_plugins[] = {
 #ifdef ENABLE_CURL
 	&input_plugin_curl,
 #endif
-#ifdef ENABLE_LASTFM
-	&lastfm_input_plugin,
-#endif
 #ifdef ENABLE_MMS
 	&input_plugin_mms,
 #endif