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.

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KlibIrVersion.kt

@@ -1,32 +0,0 @@
-package org.jetbrains.kotlin.backend.common.serialization
-
-import org.jetbrains.kotlin.library.KLIB_PROPERTY_IR_VERSION
-import org.jetbrains.kotlin.library.KotlinLibrary
-import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
-
-class KlibIrVersion(major: Int, minor: Int, patch: Int) : BinaryVersion(major, minor, patch) {
-
-    override fun isCompatibleWithCurrentCompilerVersion(): Boolean = isCompatibleTo(INSTANCE)
-
-
-    companion object {
-        @JvmField
-        val INSTANCE = KlibIrVersion(1, 0, 0)
-
-        @JvmField
-        val INVALID_VERSION = KlibIrVersion(-1, -1, -1)
-    }
-}
-
-fun KlibIrVersion(vararg values: Int): KlibIrVersion {
-    if (values.size != 3) error("Ir version should be in major.minor.patch format: $values")
-    return KlibIrVersion(values[0], values[1], values[2])
-}
-
-val KotlinLibrary.metadataVersion: KlibIrVersion
-    get() {
-        val versionString = manifestProperties.getProperty(KLIB_PROPERTY_IR_VERSION)
-        val versionIntArray = BinaryVersion.parseVersionArray(versionString)
-            ?: error("Could not parse ir version: $versionString")
-        return KlibIrVersion(*versionIntArray)
-    }