Remove reference to compatibility layer

The compatibility layer was removed before the 1.4.0 release.

Change-Id: I268513ee9b3a2640ec33c4a25a5c5614fee7b3b2
diff --git a/examples/vp8_multi_resolution_encoder.c b/examples/vp8_multi_resolution_encoder.c
index e623567..b4272b7 100644
--- a/examples/vp8_multi_resolution_encoder.c
+++ b/examples/vp8_multi_resolution_encoder.c
@@ -37,7 +37,6 @@
 #include <unistd.h>
 #endif
 #include "vpx_ports/vpx_timer.h"
-#define VPX_CODEC_DISABLE_COMPAT 1
 #include "vpx/vpx_encoder.h"
 #include "vpx/vp8cx.h"
 #include "vpx_ports/mem_ops.h"