Remove unused resources

java/res/drawable-land-mdpi/key_hint_minus_holo.9.png

java/res/drawable-land-mdpi/key_hint_minus_large_holo.9.png

java/res/drawable-land-mdpi/key_hint_parenclose_holo.9.png

java/res/drawable-land-mdpi/key_hint_parenopen_holo.9.png

java/res/drawable-land-mdpi/key_hint_period_holo.9.png

java/res/drawable-land-mdpi/key_hint_semicolon_holo.9.png

java/res/drawable-land-mdpi/key_hint_simplequote_holo.9.png

java/res/drawable-land-mdpi/key_hint_slash_holo.9.png

java/res/drawable-land-mdpi/key_hint_slash_large_holo.9.png

java/res/drawable-land-mdpi/key_hint_smaller_holo.9.png

java/res/drawable-land-mdpi/key_hint_star_holo.9.png

java/res/drawable-land-mdpi/key_hint_underscore_holo.9.png

...s/drawable-land-mdpi/key_hint_underscore_large_holo.9.png

java/res/drawable-mdpi/cancel.png

java/res/drawable-mdpi/cancel_holo.9.png

java/res/drawable-mdpi/dialog_bubble_step02.9.png

java/res/drawable-mdpi/dialog_bubble_step07.9.png

java/res/drawable-mdpi/key_hint_dash_holo.9.png

java/res/drawable-mdpi/key_hint_doublecross_holo.9.png

java/res/drawable-mdpi/key_hint_equal_holo.9.png