Remove notification pop-up informing about find/replace overlay UI

The find/replace overlay UI inside an editor replacing the existing
find/replace dialog UI (or serving as an enabled-by-default alternative)
was released together with a notification pop-up that informs about the
new UI and the ability to switch back to the existing UI when the
product is started for the first time. After five releases, the
notification became obsolete as the UI is actually not new anymore and
most users starting a product for the first time already know it.
Thus, this change removes the notification pop-up for the find/replace
overlay UI.

Author: HeikoKlare

bundles/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/internal/findandreplace/overlay/FindReplaceOverlayFirstTimePopup.java

@@ -23,9 +23,9 @@
 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
-import org.eclipse.core.runtime.preferences.IPreferencesService;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
+import org.eclipse.core.runtime.preferences.IPreferencesService;
 import org.eclipse.core.runtime.preferences.InstanceScope;
 
 import org.eclipse.jface.dialogs.IPageChangedListener;
@@ -40,7 +40,6 @@
 import org.eclipse.ui.IWorkbenchPartSite;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.internal.findandreplace.overlay.FindReplaceOverlay;
-import org.eclipse.ui.internal.findandreplace.overlay.FindReplaceOverlayFirstTimePopup;
 
 
 /**
@@ -424,8 +423,6 @@ private void showOverlayInEditor() {
 				shellToUse = fShell;
 			}
 			overlay = new FindReplaceOverlay(shellToUse, fWorkbenchPart, fTarget);
-
-			FindReplaceOverlayFirstTimePopup.displayPopupIfNotAlreadyShown(shellToUse);
 		}
 
 		overlay.open();