Remove black wood theme because author not responding about sources.

configure.ac

data/themes/CMakeLists.txt

data/themes/Makefile.am

data/themes/blackwood/CMakeLists.txt

data/themes/blackwood/Makefile.am

data/themes/blackwood/button.png

data/themes/blackwood/button_disabled.png

data/themes/blackwood/buttonhi.png

data/themes/blackwood/buttonpress.png

data/themes/blackwood/checkbox.png

data/themes/blackwood/circle-gray.png

data/themes/blackwood/circle-green.png

data/themes/blackwood/close_button.png

data/themes/blackwood/colors.xml

data/themes/blackwood/deepbox.png

data/themes/blackwood/hscroll_left_default.png

data/themes/blackwood/hscroll_left_highlight.png

data/themes/blackwood/hscroll_left_pressed.png

data/themes/blackwood/hscroll_right_default.png

data/themes/blackwood/hscroll_right_highlight.png