Remove unused import

Author: bmarty

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/TextComposer.kt

@@ -91,7 +91,6 @@ import io.element.android.wysiwyg.compose.RichTextEditor
 import io.element.android.wysiwyg.display.TextDisplay
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
-import kotlinx.collections.immutable.toPersistentList
 import kotlinx.coroutines.launch
 import uniffi.wysiwyg_composer.MenuAction
 import kotlin.time.Duration.Companion.seconds