diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/misc.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/misc.kt
index f5c86e7bcbd..45f968c5c5c 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/misc.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/utils/misc.kt
@@ -7,25 +7,12 @@ package org.jetbrains.kotlin.descriptors.commonizer.utils
 
 import com.intellij.util.SmartFMap
 import gnu.trove.THashMap
-import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
-import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstance
 import java.util.*
 import java.util.Collections.singletonList
 import java.util.Collections.singletonMap
 import kotlin.collections.ArrayList
 
-internal infix fun <K, V> Map<K, V>.compactConcat(other: Map<K, V>): Map<K, V> =
-    when {
-        isEmpty() -> other
-        other.isEmpty() -> this
-        else -> when (val capacity = size + other.size) {
-            0, 1 -> error("Unreachable code")
-            2, 3 -> SmartFMap.emptyMap<K, V>().plusAll(this).plusAll(other)
-            else -> THashMap<K, V>(capacity).also { it.putAll(this); it.putAll(other) }
-        }
-    }
-
 internal inline fun <K : Any, V, R> Map<K, V>.compactMapValues(transform: (Map.Entry<K, V>) -> R): Map<K, R> =
     when (size) {
         0 -> emptyMap()
@@ -74,9 +61,6 @@ internal inline fun <reified T> List<T>.compact(): List<T> =
         }
     }
 
-internal inline fun <reified R> Annotations.compactMap(transform: (AnnotationDescriptor) -> R): List<R> =
-    if (isEmpty()) emptyList() else map(transform).compact()
-
 internal fun <K, V> Map<K, V>.compact(): Map<K, V> =
     when (size) {
         0 -> emptyMap()