[Cast Convergence] Remove is_cast_desktop_build from ANGLE.

Bug: angleproject:7136
Change-Id: If760b1e92467fcdf9d9eecf187e5418fe18e48d7
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3554916
Reviewed-by: Ryan Keane <rwkeane@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/BUILD.gn b/BUILD.gn
index b827a73..ef40248 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -22,9 +22,8 @@
 
 declare_args() {
   # Use the PCI lib to collect GPU information on Linux.
-  use_libpci =
-      (is_linux || is_chromeos) && (!is_chromecast || is_cast_desktop_build) &&
-      (angle_use_x11 || use_ozone) && angle_has_build
+  use_libpci = (is_linux || is_chromeos) && (angle_use_x11 || use_ozone) &&
+               angle_has_build
 
   # Enable using Vulkan to collect system info as a fallback.
   angle_enable_vulkan_system_info = false