KLIB Metadata API: Drop unused stuff from `KlibMetadataPackageFragment` This is a preparatory fix needed before landing the main changes done in the scope of KT-81411.

diff --git a/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataPackageFragment.kt b/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataPackageFragment.kt
index 636f1a6..c08f788 100644
--- a/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataPackageFragment.kt
+++ b/compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/KlibMetadataPackageFragment.kt

@@ -19,7 +19,6 @@
 import org.jetbrains.kotlin.serialization.deserialization.DeserializedPackageFragment
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedPackageMemberScope
 import org.jetbrains.kotlin.serialization.deserialization.getClassId
-import org.jetbrains.kotlin.serialization.deserialization.getName
 import org.jetbrains.kotlin.storage.StorageManager
 import java.lang.ref.SoftReference
 
@@ -122,15 +121,6 @@
 
     override fun getMemberScope(): DeserializedPackageMemberScope = _memberScope
 
-    private val classifierNames: Set<Name> by lazy {
-        val result = mutableSetOf<Name>()
-        result.addAll(loadClassNames())
-        protoForNames.getPackage().typeAliasList.mapTo(result) { nameResolver.getName(it.name) }
-        result
-    }
-
-    fun hasTopLevelClassifier(name: Name): Boolean = name in classifierNames
-
     private fun loadClassNames(): Collection<Name> {
 
         val classNameList = protoForNames.getExtension(KlibMetadataProtoBuf.className).orEmpty()