Removed unused styling on JComboBox

This was left by mistake when I was attempting to change
the combobox's renderer, this element's styling is never displayed so I
decided to remove it.

runelite-client/src/main/java/net/runelite/client/plugins/config/ConfigPanel.java

@@ -399,8 +399,6 @@ public class ConfigPanel extends PluginPanel
 		if (component instanceof JComboBox)
 		{
 			JComboBox jComboBox = (JComboBox) component;
-			jComboBox.setRenderer(new ComboBoxListRenderer());
-			jComboBox.setForeground(Color.WHITE);
 			configManager.setConfiguration(cd.getGroup().keyName(), cid.getItem().keyName(), ((Enum) jComboBox.getSelectedItem()).name());
 		}
 	}