clean release

release/mapping.bzl

@@ -1,6 +1,5 @@
 def gen_mappings(os, arch, ver):
   return {
-    "v2ray_core/release/doc": "doc",
     "v2ray_core/release/config": "",
     "v2ray_core/main/" + os + "/" + arch + "/" + ver: "",
     "v2ray_core/infra/control/main/" + os + "/" + arch + "/" + ver : "",