Remove fmtlib explicit dependency. (#9702)

This PR removes the temporary fmtlib dependency introduced in #9650 (see
issue #9653).

As explained [in this comment][1], the dependency was only added to work
around a build issue that should have been fixed upstream in PyTorch.
Before the `fmtlib` version bump to 12 in PyTorch
(pytorch/pytorch#163441), `fmtlib` headers were exported by default.
After the bump, they stopped being exported, which caused the issue.

That behavior has since been fixed in PyTorch (pytorch/pytorch#164139),
so we can safely remove the explicit fmtlib dependency.

[1]:
#9650 (review)

Author: ysiraichi

WORKSPACE

@@ -42,12 +42,6 @@ new_local_repository(
     path = PYTORCH_LOCAL_DIR,
 )
 
-new_local_repository(
-    name = "fmt",
-    build_file = "//bazel:fmt.BUILD",
-    path = PYTORCH_LOCAL_DIR + "/third_party/fmt",
-)
-
 ############################# OpenXLA Setup ###############################
 
 # To build PyTorch/XLA with a new revison of OpenXLA, update the xla_hash to

bazel/fmt.BUILD

@@ -10,9 +10,6 @@ cc_library(
         ["torch/include/**/*.h"],
         ["torch/include/google/protobuf/**/*.h"],
     ),
-    deps = [
-        "@fmt",
-    ],
     strip_include_prefix = "torch/include",
 )