Just like moving the app icons, you can delete apps by touching and holding any icon on the Home screen until they start to jiggle. Then you can tap the minus sign on the icon of the app you want to delete. After that, just confirm you want to delete it and it will immediately be uninstalled. Aside from that, you can also touch and hold on the icon of the app you want to delete until the options menu shows. Then choose Delete App and then confirm by tapping Delete.