replace PlatformTestCase.isRunInEdt() with UsefulTestCase.runInDispatchThread(), there's no reason to keep both

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

@@ -708,12 +708,8 @@ public abstract class PlatformTestCase extends UsefulTestCase implements DataPro
     }
   }
 
-  protected boolean isRunInEdt() {
-    return true;
-  }
-
   protected void runBareRunnable(ThrowableRunnable<Throwable> runnable) throws Throwable {
-    if (isRunInEdt()) {
+    if (runInDispatchThread()) {
       EdtTestUtil.runInEdtAndWait(runnable);
     }
     else {

platform/vcs-tests/testSrc/com/intellij/vcs/test/VcsPlatformTest.kt

@@ -88,7 +88,7 @@ abstract class VcsPlatformTest : PlatformTestCase() {
     // we don't need a module in Git tests
   }
 
-  override fun isRunInEdt(): Boolean {
+  override fun runInDispatchThread(): Boolean {
     return false
   }
 

plugins/github/test/org/jetbrains/plugins/github/test/GithubTest.java

@@ -206,9 +206,4 @@ public abstract class GithubTest extends GitPlatformTest {
 
   protected void afterTest() throws Exception {
   }
-
-  @Override
-  protected boolean isRunInEdt() {
-    return true;
-  }
 }