[Commonizer] Logging: Remove 'COMMONIZATION' prologue

^KT-36679

native/commonizer/src/org/jetbrains/kotlin/commonizer/cli/Task.kt

@@ -16,7 +16,7 @@ internal abstract class Task(private val options: Collection<Option<*>>) : Compa
         // Important: the order of entries affects that order of tasks execution
         INFORMATIONAL,
         COMMONIZATION(
-            prologue = "\nKotlin KLIB commonizer: Please wait while preparing libraries.",
+            prologue = null,
             epilogue = "\n",
             logEachStep = true
         )