Revert "[tsan] Supress TSan"

This reverts commit 5f484ccbad9be09c4d989505a0181d0b5f90d437.

Reason for revert: config:temporarily_disable_tsan_do_not_use is not available anymore.

Original change's description:
> [tsan] Supress TSan
>
> Our version of cURL has known thread-safety issues that are fixed
> upsteam. Suppress until we can roll.
>
> Bug: 90156
>
> Change-Id: I79606085ec380b2c0835c257b542d23054d7f0da
> Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/curl/+/616627
> Reviewed-by: Shai Barack <shayba@google.com>

Bug: 90156
Change-Id: I2f634063d21043678c4ec1b62c8e7e98ff1e2b5d
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/curl/+/662609
Reviewed-by: Nathan Mulcahey <nmulcahey@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 362c615..5381bb7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -315,11 +315,7 @@
   }
   include_dirs = [ "lib" ]
   public_configs = [ ":curl_config" ]
-  configs += [
-    # TODO(fxbug.dev/90156): Roll cURL and remove.
-    "//build/config:temporarily_disable_tsan_do_not_use",
-    ":suppress_warnings",
-  ]
+  configs += [ ":suppress_warnings" ]
 }
 
 config("suppress_warnings") {