Remove dead code.

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/util/MutableListExt.kt

@@ -1,15 +0,0 @@
-/*
- * Copyright 2022-2024 New Vector Ltd.
- *
- * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
- * Please see LICENSE files in the repository root for full details.
- */
-
-package io.element.android.features.messages.impl.timeline.util
-
-internal inline fun <reified T> MutableList<T?>.invalidateLast() {
-    val indexOfLast = size
-    if (indexOfLast > 0) {
-        set(indexOfLast - 1, null)
-    }
-}