message: remove //cc/file dep from //cc/dual_net:batching_dual_net
diff: @@ -175,13 +175,6 @@ minigo_cc_library(
  hdrs = ["batching_dual_net.h"],
  deps = [
  ":dual_net",
  - # DO NOT CHECK IN
  - # DO NOT CHECK IN
  - # DO NOT CHECK IN
  - "//cc/file",
  - # DO NOT CHECK IN
  - # DO NOT CHECK IN
  - # DO NOT CHECK IN
  "//cc:base",
  "//cc:check",
  "@com_google_absl//absl/container:flat_hash_map",
  