Remove number hint from 7 inch layout

java/res/drawable-sw600dp-hdpi/key_hint_num0_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num1_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num2_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num3_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num4_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num5_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num6_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num7_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num8_holo.9.png

java/res/drawable-sw600dp-hdpi/key_hint_num9_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num0_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num1_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num2_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num3_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num4_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num5_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num6_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num7_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num8_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num9_holo.9.png