Remove old src/tests/

src/tests/Makefile.am

src/tests/common/acl_tests.c

src/tests/common/acl_tests.h

src/tests/common/base32hex_tests.c

src/tests/common/base32hex_tests.h

src/tests/common/base64_tests.c

src/tests/common/base64_tests.h

src/tests/common/descriptor_tests.c

src/tests/common/descriptor_tests.h

src/tests/common/events_tests.c

src/tests/common/events_tests.h

src/tests/common/fdset_tests.c

src/tests/common/fdset_tests.h

src/tests/common/hattrie_tests.c

src/tests/common/hattrie_tests.h

src/tests/common/slab_tests.c

src/tests/common/slab_tests.h

src/tests/files/sample_conf

src/tests/knot/conf_tests.c

src/tests/knot/conf_tests.h