diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -220,9 +220,7 @@
 }
 
 function threadActualMembers(
-  memberInfos: $ReadOnlyArray<
-    LegacyMemberInfo | MinimallyEncodedMemberInfo | RelativeMemberInfo,
-  >,
+  memberInfos: $ReadOnlyArray<MinimallyEncodedMemberInfo | RelativeMemberInfo>,
 ): $ReadOnlyArray<string> {
   return memberInfos
     .filter(memberInfo => memberInfo.role)