remove configure and Makefiles

CMakeLists.txt

README

aom/aom_codec.mk

aom_dsp/aom_dsp.mk

aom_mem/aom_mem.mk

aom_ports/aom_ports.mk

aom_scale/aom_scale.mk

aom_util/aom_util.mk

aomdec.c

aomenc.c

av1/av1_common.mk

av1/av1_cx.mk

av1/av1_dx.mk

build/cmake/aom_configure.cmake

build/make/Android.mk

build/make/Makefile

build/make/armlink_adapter.sh

build/make/configure.sh

build/make/gen_asm_deps.sh

build/make/gen_msvs_def.sh