Improve performance from thread being updated to data available to render.

core-util/src/main/java/org/signal/core/util/StringExtensions.kt

@@ -22,23 +22,6 @@ fun String.asListContains(item: String): Boolean {
       .any { item.startsWith(it) }
 }
 
-/**
- * Turns a multi-line string into a single-line string stripped of indentation, separated by spaces instead of newlines.
- *
- * e.g.
- *
- * a
- *   b
- * c
- *
- * turns into
- *
- * a b c
- */
-fun String.toSingleLine(): String {
-  return this.trimIndent().split("\n").joinToString(separator = " ")
-}
-
 fun String?.emptyIfNull(): String {
   return this ?: ""
 }