remove legacy libtbm backend
-rw-r--r-- 80 AUTHORS
-rw-r--r-- 1140 COPYING
-rw-r--r-- 0 ChangeLog
-rw-r--r-- 14 Makefile.am
-rw-r--r-- 0 NEWS
-rw-r--r-- 0 README
-rwxr-xr-x 195 autogen.sh
-rwxr-xr-x 2750 configure.ac
drwxr-xr-x - packaging
drwxr-xr-x - rules
drwxr-xr-x - src