Simplify exclude_unwind_tables definition

This exception shouldn't be necessary after e93c224e ("Make
exclude_unwind_tables only dependent on is_official_build")
as Chromecast does set is_official_build for release builds.

Bug: 1040148

Change-Id: Ifb0d9c2e7388de287594487aba7abc866e3ab18c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1993742
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732239}

build/config/compiler/compiler.gni

@@ -93,9 +93,7 @@ declare_args() {
   # For unofficial (e.g. development) builds and non-Chrome branded (e.g. Cronet
   # which doesn't use Crashpad, crbug.com/479283) builds it's useful to be able
   # to unwind at runtime.
-  exclude_unwind_tables =
-      is_official_build || (is_chromecast && !is_cast_desktop_build &&
-                            !is_debug && !cast_is_debug && !is_fuchsia)
+  exclude_unwind_tables = is_official_build
 }
 
 assert(!is_cfi || use_thin_lto, "CFI requires ThinLTO")