Add missed change for commit 55104335d6ef

One of the changed files has been mistakenly missed
for the commit 55104335d6efeb2838a4ec187144e24958d1dee3

https://aomedia-review.googlesource.com/#/c/aom/+/18261/

Change-Id: Ie47f882a25e650bb4d74d5675f2306adc9e654a7
diff --git a/av1/av1_cx_iface.c b/av1/av1_cx_iface.c
index aa2cc22..0f5e5f7 100644
--- a/av1/av1_cx_iface.c
+++ b/av1/av1_cx_iface.c
@@ -328,14 +328,6 @@
   if (extra_cfg->tuning == AOM_TUNE_SSIM)
     ERROR("Option --tune=ssim is not currently supported in AV1.");
 
-#if CONFIG_DIST_8X8
-  if (extra_cfg->tuning == AOM_TUNE_CDEF_DIST)
-    ERROR("Option --tune=cdef-dist is not currently supported in AV1.");
-
-  if (extra_cfg->tuning == AOM_TUNE_DAALA_DIST)
-    ERROR("Option --tune=daala-dist is not currently supported in AV1.");
-#endif  // CONFIG_DIST_8X8
-
   if (cfg->g_pass == AOM_RC_LAST_PASS) {
 #if !CONFIG_XIPHRC
     const size_t packet_sz = sizeof(FIRSTPASS_STATS);