[IR SERIALIZATION] Get rid of UniqId proto message

- encode locality flag in major bit of uniqid (1 - global, 0 - local)

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/lower/serialization/ir/JsIrLinker.kt

@@ -29,7 +29,7 @@ class JsIrLinker(
         JsDescriptorReferenceDeserializer(currentModule, mangler, builtIns)
 
     override fun reader(moduleDescriptor: ModuleDescriptor, fileIndex: Int, uniqId: UniqId) =
-        moduleDescriptor.kotlinLibrary.irDeclaration(uniqId.index, uniqId.isLocal, fileIndex)
+        moduleDescriptor.kotlinLibrary.irDeclaration(uniqId.index, fileIndex)
 
     override fun readSymbol(moduleDescriptor: ModuleDescriptor, fileIndex: Int, symbolIndex: Int) =
         moduleDescriptor.kotlinLibrary.symbol(symbolIndex, fileIndex)

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/lower/serialization/ir/JsMangler.kt

@@ -11,10 +11,6 @@ import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.util.isInlined
 
 object JsMangler : KotlinManglerImpl() {
-    private const val MOD_VALUE = PUBLIC_LOCAL_UNIQ_ID_EDGE
-
-    override val String.hashMangle: Long get() = cityHash64() % MOD_VALUE
-
     override val IrType.isInlined: Boolean
         get() = this.isInlined()
 }