Remove references to lmdb and xxHash sources in setup.py.

setup.py

@@ -23,9 +23,6 @@ sources = (
     glob(f"{CODEC_DIR}/codec_*.c") +
     glob(f"{CPY_DIR}/*.c") +
     [
-        f"{EXT_DIR}/openldap/libraries/liblmdb/mdb.c",
-        f"{EXT_DIR}/openldap/libraries/liblmdb/midl.c",
-        f"{EXT_DIR}/xxHash/xxhash.c",
         f"{EXT_DIR}/hashmap/hashmap.c",
         f"{EXT_DIR}/tpl/src/tpl.c",
         f"{EXT_DIR}/log/src/log.c",