clientui: fix double requestFocusInWindow() when showing frame

requestFocus() always calls giveClientFocus() in addition to requesting
focus, so it is not necessary to call giveClientFocus() separately on
startup.

runelite-client/src/main/java/net/runelite/client/ui/ClientUI.java

@@ -570,7 +570,6 @@ public class ClientUI
 			frame.setVisible(true);
 			frame.toFront();
 			requestFocus();
-			giveClientFocus();
 			log.info("Showing frame {}", frame);
 			frame.revalidateMinimumSize();
 		});