[CQ] VMServiceManager remove legacy heap/frame monitoring (#8174)

Performance monitoring is now in devtools so we can stop heap/frame
monitoring (which has been unused since the legacy inspector view went
away).

_There are more threads to pull on here (for example the
`DisplayRefreshRateManager` may be able to go away too but we need to be
sure it doesn't have side-effects that are depended on elsewhere) but
this is a good place to start._

---

- [x] I’ve reviewed the contributor guide and applied the relevant
portions to this PR.

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Author: pq

flutter-idea/src/io/flutter/run/daemon/FlutterApp.java

@@ -41,12 +41,7 @@
 import io.flutter.run.FlutterLaunchMode;
 import io.flutter.run.common.RunMode;
 import io.flutter.settings.FlutterSettings;
-import io.flutter.utils.MostlySilentColoredProcessHandler;
-import io.flutter.utils.ProgressHelper;
-import io.flutter.utils.StreamSubscription;
-import io.flutter.utils.UrlUtils;
-import io.flutter.utils.VmServiceListenerAdapter;
-import io.flutter.vmService.DisplayRefreshRateManager;
+import io.flutter.utils.*;
 import io.flutter.vmService.ServiceExtensions;
 import io.flutter.vmService.VMServiceManager;
 import org.dartlang.vm.service.VmService;
@@ -302,7 +297,9 @@ public ObservatoryConnector getConnector() {
     return myConnector;
   }
 
-  /** @noinspection BooleanMethodIsAlwaysInverted*/
+  /**
+   * @noinspection BooleanMethodIsAlwaysInverted
+   */
   public boolean appSupportsHotReload() {
     // Introspect based on registered services.
     if (myVMServiceManager != null && myVMServiceManager.hasAnyRegisteredServices()) {
@@ -686,11 +683,6 @@ public VMServiceManager getVMServiceManager() {
     return myVMServiceManager;
   }
 
-  @Nullable
-  public DisplayRefreshRateManager getDisplayRefreshRateManager() {
-    return myVMServiceManager != null ? myVMServiceManager.displayRefreshRateManager : null;
-  }
-
   @NotNull
   public Project getProject() {
     return myProject;