fix up the linter

Author: nplasterer

library/src/main/java/org/xmtp/android/library/Conversations.kt

@@ -46,7 +46,6 @@ import uniffi.xmtpv3.FfiListConversationsOptions
 import uniffi.xmtpv3.FfiMessage
 import uniffi.xmtpv3.FfiMessageCallback
 import uniffi.xmtpv3.GroupPermissions
-import uniffi.xmtpv3.org.xmtp.android.library.codecs.ContentTypeGroupMembershipChange
 import java.util.Date
 import kotlin.time.Duration.Companion.nanoseconds
 import kotlin.time.DurationUnit