removed remaining usages of IDEA_MARKER_CLASS

java/testFramework/src/com/intellij/testFramework/fixtures/LightCodeInsightFixtureTestCase.java

@@ -84,7 +84,6 @@ public abstract class LightCodeInsightFixtureTestCase extends UsefulTestCase{
 
   @SuppressWarnings("JUnitTestCaseWithNonTrivialConstructors")
   public LightCodeInsightFixtureTestCase(String classToTest, String prefix) {
-    PlatformTestCase.initPlatformPrefix(classToTest, prefix);
   }
 
   @Override

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

@@ -832,7 +832,6 @@ public abstract class PlatformTestCase extends UsefulTestCase implements DataPro
    * @deprecated calling this method is no longer necessary
    */
   public static void initPlatformLangPrefix() {
-    initPlatformPrefix(IDEA_MARKER_CLASS, "PlatformLangXml");
   }
 
   /**
@@ -843,7 +842,7 @@ public abstract class PlatformTestCase extends UsefulTestCase implements DataPro
    * is NOT present in classpath.
    * Also, only the very FIRST call to this method will take effect.
    *
-   * @param classToTest marker class qualified name e.g. {@link #IDEA_MARKER_CLASS}.
+   * @param classToTest marker class qualified name
    * @param prefix platform prefix to be set up if marker class not found in classpath.
    * @deprecated calling this method is no longer necessary
    */

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

@@ -82,7 +82,7 @@ import java.util.regex.Pattern;
 @SuppressWarnings("UseOfSystemOutOrSystemErr")
 public abstract class UsefulTestCase extends TestCase {
   public static final boolean IS_UNDER_TEAMCITY = System.getenv("TEAMCITY_VERSION") != null;
-
+  @Deprecated
   public static final String IDEA_MARKER_CLASS = "com.intellij.openapi.roots.IdeaModifiableModelsProvider";
   public static final String TEMP_DIR_MARKER = "unitTest_";