downgrade deprecation warns into debug_warns

Signed-off-by: Jason Volk <jason@zemos.net>

crates/ruma-common/src/api/metadata.rs

@@ -317,6 +317,7 @@ impl VersionHistory {
                 self.removed.expect("VersioningDecision::Removed implies metadata.removed"),
             )),
             VersioningDecision::Stable { any_deprecated, all_deprecated, any_removed } => {
+                if cfg!(debug_assertions) {
                     if any_removed {
                         if all_deprecated {
                             warn!(
@@ -342,6 +343,7 @@ impl VersionHistory {
                          {versions:?}",
                         );
                     }
+                }
 
                 Ok(self
                     .stable_endpoint_for(versions)