Remove NaCl reference in our BUILD.gn for Abseil.

NaCl is no longer supported in Chromium and being removed.

Bug:
Change-Id: Ic5e38ad0135e7afab674db24b81541e5e12d027d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/249474
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

third_party/gn/abseil-cpp/BUILD.gn

diff --git a/third_party/gn/abseil-cpp/BUILD.gn b/third_party/gn/abseil-cpp/BUILD.gn
index 4e34b8d..b260fab 100644
--- a/third_party/gn/abseil-cpp/BUILD.gn
+++ b/third_party/gn/abseil-cpp/BUILD.gn
@@ -168,17 +168,6 @@
   if (is_component_build) {
     public_deps += [ ":absl_full_deps" ]
   }
-
-  # The following dependencies currently don't build with NaCl.
-  # TODO(https://crbug.com/1114625): Fix build errors and remove this section.
-  #
-  # Note: This target currently is not implemented in this file, so
-  # this logic is disabled, if :failure_signal_handler gets ported
-  # this will need to be re-enabled
-  # if (is_nacl) {
-  #   public_deps -=
-  #       [ "//third_party/abseil-cpp/absl/debugging:failure_signal_handler" ]
-  # }
 }
 
 # The 'absl_full' target is not implemented here, since it includes a