Cleanup: drop KlibIrVersion

Review: https://jetbrains.team/p/kt/reviews/8401
In scope of: KT-55082

Because this version isn't used for anything. We have KotlinAbiVersion
to version the IR format.

kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/jvm/InteropLibraryCreation.kt

@@ -10,7 +10,6 @@ import kotlinx.metadata.klib.KlibModuleFragmentWriteStrategy
 import kotlinx.metadata.klib.KlibModuleMetadata
 import kotlinx.metadata.klib.className
 import kotlinx.metadata.klib.fqName
-import org.jetbrains.kotlin.backend.common.serialization.KlibIrVersion
 import org.jetbrains.kotlin.config.KotlinCompilerVersion
 import org.jetbrains.kotlin.konan.file.File
 import org.jetbrains.kotlin.konan.library.impl.KonanLibraryLayoutForWriter
@@ -42,7 +41,6 @@ fun createInteropLibrary(
             abiVersion = KotlinAbiVersion.CURRENT,
             compilerVersion = KotlinCompilerVersion.VERSION,
             metadataVersion = KlibMetadataVersion.INSTANCE.toString(),
-            irVersion = KlibIrVersion.INSTANCE.toString()
     )
     val libFile = File(outputPath)
     val unzippedDir = if (nopack) libFile else org.jetbrains.kotlin.konan.file.createTempDir("klib")

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/driver/phases/WriteKlib.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.backend.konan.driver.phases
 
-import org.jetbrains.kotlin.backend.common.serialization.KlibIrVersion
 import org.jetbrains.kotlin.backend.konan.KonanConfigKeys
 import org.jetbrains.kotlin.backend.konan.OutputFiles
 import org.jetbrains.kotlin.backend.konan.driver.PhaseContext
@@ -30,13 +29,11 @@ internal val WriteKlibPhase = createSimpleNamedCompilerPhase<PhaseContext, Seria
     val compilerVersion = KotlinCompilerVersion.getVersion().toString()
     val libraryVersion = configuration.get(KonanConfigKeys.LIBRARY_VERSION)
     val metadataVersion = KlibMetadataVersion.INSTANCE.toString()
-    val irVersion = KlibIrVersion.INSTANCE.toString()
     val versions = KotlinLibraryVersioning(
             abiVersion = abiVersion,
             libraryVersion = libraryVersion,
             compilerVersion = compilerVersion,
             metadataVersion = metadataVersion,
-            irVersion = irVersion
     )
     val target = config.target
     val manifestProperties = config.manifestProperties

kotlin-native/klib/src/main/kotlin/org/jetbrains/kotlin/cli/klib/main.kt

@@ -116,7 +116,6 @@ class Library(val libraryNameOrPath: String, val requestedRepository: String?, v
         val headerCompilerVersion = library.versions.compilerVersion
         val headerLibraryVersion = library.versions.libraryVersion
         val headerMetadataVersion = library.versions.metadataVersion
-        val headerIrVersion = library.versions.irVersion
         val moduleName = ModuleDeserializer(library.moduleHeaderData).moduleName
 
         println("")
@@ -126,7 +125,6 @@ class Library(val libraryNameOrPath: String, val requestedRepository: String?, v
         println("Compiler version: ${headerCompilerVersion}")
         println("Library version: $headerLibraryVersion")
         println("Metadata version: $headerMetadataVersion")
-        println("IR version: $headerIrVersion")
 
         if (library is KonanLibrary) {
             val targets = library.targetList.joinToString(", ")