af: remove conversion filter search

This attempted to find a minimal filter graph for a format conversion
involving multiple conversion filters. With the last 2 commits it
becomes dead code - remove it.

1 files changed, 0 insertions, 1 deletions

diff --git a/audio/filter/af.h b/audio/filter/af.h
index fb5f74b253..b35901232d 100644
--- a/audio/filter/af.h
+++ b/audio/filter/af.h
@@ -48,7 +48,6 @@ struct af_info {
     const char *name;
     const int flags;
     int (*open)(struct af_instance *vf);
-    bool (*test_conversion)(int src_format, int dst_format);
     int priv_size;
     const void *priv_defaults;
     const struct m_option *options;