Revert "JVM IR: Implement CHECK_NOT_NULL as a lowering"

This reverts commit dcd72b06d8.

Using a temporary variable has an effect on casts and GC.

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -3450,6 +3450,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/casts/nullableSafeCastToTypeParameterWithInterfaceUpperBound.kt");
         }
 
+        @TestMetadata("objectToPrimitiveWithAssertion.kt")
+        public void testObjectToPrimitiveWithAssertion() throws Exception {
+            runTest("compiler/testData/codegen/box/casts/objectToPrimitiveWithAssertion.kt");
+        }
+
         @TestMetadata("unitAsAny.kt")
         public void testUnitAsAny() throws Exception {
             runTest("compiler/testData/codegen/box/casts/unitAsAny.kt");