[Wasm] Remove unused super class field in type info

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmSymbols.kt

@@ -129,7 +129,6 @@ class WasmSymbols(
     val getVirtualMethodId = getInternalFunction("getVirtualMethodId")
     val getInterfaceImplId = getInternalFunction("getInterfaceImplId")
 
-    val isSubClass = getInternalFunction("isSubClass")
     val isInterface = getInternalFunction("isInterface")
 
     val nullableEquals = getInternalFunction("nullableEquals")

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/DeclarationGenerator.kt

@@ -275,14 +275,6 @@ class DeclarationGenerator(val context: WasmModuleCodegenContext) : IrElementVis
 
     private fun binaryDataStruct(classMetadata: ClassMetadata): ConstantDataStruct {
         val invalidIndex = -1
-        val superClass = classMetadata.superClass?.klass
-
-        val superClassSymbol: WasmSymbol<Int> =
-            superClass?.let { context.referenceClassId(it.symbol) } ?: WasmSymbol(invalidIndex)
-
-        val superTypeField =
-            ConstantDataIntField("Super class", superClassSymbol)
-
         val vtableSizeField = ConstantDataIntField(
             "V-table length",
             classMetadata.virtualMethods.size
@@ -307,7 +299,6 @@ class DeclarationGenerator(val context: WasmModuleCodegenContext) : IrElementVis
         return ConstantDataStruct(
             "Class TypeInfo: ${classMetadata.klass.fqNameWhenAvailable} ",
             listOf(
-                superTypeField,
                 interfaceTablePtr,
                 vtableSizeField,
                 vtableArray,

libraries/stdlib/wasm/internal/kotlin/wasm/internal/TypeInfo.kt

@@ -10,8 +10,7 @@ package kotlin.wasm.internal
 internal const val TYPE_INFO_ELEMENT_SIZE = 4
 
 
-internal const val SUPER_CLASS_ID_OFFSET = 0
+internal const val TYPE_INFO_ITABLE_PTR_OFFSET = 0
-internal const val TYPE_INFO_ITABLE_PTR_OFFSET = SUPER_CLASS_ID_OFFSET + TYPE_INFO_ELEMENT_SIZE
 internal const val TYPE_INFO_VTABLE_LENGTH_OFFSET = TYPE_INFO_ITABLE_PTR_OFFSET + TYPE_INFO_ELEMENT_SIZE
 internal const val TYPE_INFO_VTABLE_OFFSET = TYPE_INFO_VTABLE_LENGTH_OFFSET + TYPE_INFO_ELEMENT_SIZE
 
@@ -27,9 +26,6 @@ internal fun getItablePtr(obj: Any): Int =
 internal fun getInterfaceListLength(itablePtr: Int): Int =
     wasm_i32_load(itablePtr + TYPE_INFO_VTABLE_LENGTH_OFFSET)
 
-internal fun getSuperClassId(obj: Any): Int =
-    wasm_i32_load(obj.typeInfo + SUPER_CLASS_ID_OFFSET)
-
 internal fun getVirtualMethodId(obj: Any, virtualFunctionSlot: Int): Int {
     val vtablePtr = getVtablePtr(obj)
     val methodIdPtr = vtablePtr + virtualFunctionSlot * TYPE_INFO_ELEMENT_SIZE
@@ -54,18 +50,6 @@ internal fun getInterfaceImplId(obj: Any, interfaceId: Int): Int {
     return -1
 }
 
-
-internal fun isSubClassOfImpl(currentClassId: Int, otherClassId: Int): Boolean {
-    if (currentClassId == otherClassId) return true
-    val anyClassId = wasmClassId<Any>()
-    if (currentClassId == anyClassId && otherClassId != anyClassId) return false
-    return isSubClassOfImpl(wasm_i32_load(currentClassId + SUPER_CLASS_ID_OFFSET), otherClassId)
-}
-
-internal fun isSubClass(obj: Any, classId: Int): Boolean {
-    return isSubClassOfImpl(obj.typeInfo, classId)
-}
-
 internal fun isInterface(obj: Any, interfaceId: Int): Boolean {
     return getInterfaceImplId(obj, interfaceId) != -1
 }