Revert "NI: Prefer nullable lower bound to flexible one when substitution of type variable is performed ^KT-32435 Fixed"

This reverts commit 09c2b92b

js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java

@@ -13946,11 +13946,6 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/platformTypes"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JS_IR, true);
         }
 
-        @TestMetadata("inferenceFlexibleTToNullable.kt")
-        public void testInferenceFlexibleTToNullable() throws Exception {
-            runTest("compiler/testData/codegen/box/platformTypes/inferenceFlexibleTToNullable.kt");
-        }
-
         @TestMetadata("compiler/testData/codegen/box/platformTypes/primitives")
         @TestDataPath("$PROJECT_ROOT")
         @RunWith(JUnit3RunnerWithInners.class)

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -15126,11 +15126,6 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/platformTypes"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JS, true);
         }
 
-        @TestMetadata("inferenceFlexibleTToNullable.kt")
-        public void testInferenceFlexibleTToNullable() throws Exception {
-            runTest("compiler/testData/codegen/box/platformTypes/inferenceFlexibleTToNullable.kt");
-        }
-
         @TestMetadata("compiler/testData/codegen/box/platformTypes/primitives")
         @TestDataPath("$PROJECT_ROOT")
         @RunWith(JUnit3RunnerWithInners.class)