test: remove cargo-culted LibVLC parameters

 * ignore-config is enabled by default
 * intf is irrelevant (as libvlc_add_intf() is not called in tests)
 * media-library is disabled by default
 * aout is overriden by the media player
 * vout is overriden by the media player

test/libvlc/test.h

@@ -49,12 +49,6 @@
 
 static const char * test_defaults_args[] = {
     "-v",
-    "--ignore-config",
-    "-I",
-    "dummy",
-    "--no-media-library",
-    "--vout=dummy",
-    "--aout=dummy"
 };
 
 static const int test_defaults_nargs =