[tests] cleanup: remove unnecessary clearField calls

This isn't needed since we call it in UsefulTestCase::tearDown.

GitOrigin-RevId: 9edcc484b5adc310b73c82b4faab5bd758f509dc

platform/testFramework/src/com/intellij/testFramework/PlatformLiteFixture.java

@@ -42,12 +42,7 @@ public abstract class PlatformLiteFixture extends UsefulTestCase {
   @Override
   protected void tearDown() throws Exception {
     myProject = null;
-    try {
-      super.tearDown();
-    }
-    finally {
-      clearFields(this);
-    }
+    super.tearDown();
   }
 
   protected <T> void registerExtension(@NotNull ExtensionPointName<T> extensionPointName, @NotNull T extension) {

python/testSrc/com/jetbrains/python/fixtures/PyTestCase.java

@@ -277,7 +277,6 @@ public abstract class PyTestCase extends UsefulTestCase {
     }
     finally {
       super.tearDown();
-      clearFields(this);
     }
   }