[Native] Drop createField from IrUtils2

We can call `IrFieldImpl` directly, the same way it is done
for other IR declarations in `CBridgeGen` file.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt

@@ -17,18 +17,12 @@ import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.declarations.impl.IrClassImpl
+import org.jetbrains.kotlin.ir.declarations.impl.*
-import org.jetbrains.kotlin.ir.declarations.impl.IrConstructorImpl
-import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
-import org.jetbrains.kotlin.ir.declarations.impl.IrValueParameterImpl
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrFunctionReferenceImpl
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
-import org.jetbrains.kotlin.ir.symbols.impl.IrClassSymbolImpl
+import org.jetbrains.kotlin.ir.symbols.impl.*
-import org.jetbrains.kotlin.ir.symbols.impl.IrConstructorSymbolImpl
-import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
-import org.jetbrains.kotlin.ir.symbols.impl.IrValueParameterSymbolImpl
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.konan.ForeignExceptionMode
@@ -1128,13 +1122,18 @@ private class ObjCBlockPointerValuePassing(
         irClass.superTypes += stubs.irBuiltIns.anyType
         irClass.superTypes += functionType.makeNotNull()
 
-        val blockHolderField = createField(
+        val blockHolderField = IrFieldImpl(
                 startOffset, endOffset,
                 OBJC_BLOCK_FUNCTION_IMPL,
-                stubs.irBuiltIns.anyType,
+                IrFieldSymbolImpl(),
                 Name.identifier("blockHolder"),
-                isMutable = false, owner = irClass
+                stubs.irBuiltIns.anyType,
+                DescriptorVisibilities.PRIVATE,
+                isFinal = true,
+                isStatic = false,
+                isExternal = false
         )
+        irClass.addChild(blockHolderField)
 
         val constructor = IrConstructorImpl(
                 startOffset, endOffset,

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/ir/util/IrUtils2.kt

@@ -160,30 +160,6 @@ fun IrBuilderWithScope.irCatch(type: IrType) =
                 }
         )
 
-fun createField(
-        startOffset: Int,
-        endOffset: Int,
-        origin: IrDeclarationOrigin,
-        type: IrType,
-        name: Name,
-        isMutable: Boolean,
-        owner: IrClass
-) =
-    IrFieldImpl(
-            startOffset, endOffset,
-            origin,
-            IrFieldSymbolImpl(),
-            name,
-            type,
-            DescriptorVisibilities.PRIVATE,
-            !isMutable,
-            false,
-            false,
-    ).apply {
-        owner.declarations += this
-        parent = owner
-    }
-
 fun IrValueParameter.copy(newDescriptor: ParameterDescriptor): IrValueParameter {
     // Aggressive use of IrBasedDescriptors during deserialization
     // makes these types different.