Sandbox swiftshader_spvtools_update_build_version

Sandboxing produces this diff:
  1c1
  < "v2023.2", "SPIRV-Tools v2023.2 android-u-beta-1-gpl-587-g9d167f845"
  ---
  > "v2023.2", "SPIRV-Tools v2023.2 unknown hash, 2023-11-30T17:54:23"

But the git repository is already not garunteed to exist on CI, and
the genrule is consequently commented with a FIXME about that.

Bug: 307824623
Test: ./build/soong/tests/genrule_sandbox_test.py swiftshader_spvtools_update_build_version
Change-Id: I98e65781bd49137662ed020927940b0f3e4d645b
diff --git a/genrule/allowlists.go b/genrule/allowlists.go
index d74bf61..d8819b2 100644
--- a/genrule/allowlists.go
+++ b/genrule/allowlists.go
@@ -27,7 +27,6 @@
 		"aidl_camera_build_version",
 		"camera-its",
 		"libcore-non-cts-tests-txt",
-		"swiftshader_spvtools_update_build_version",
 		// go/keep-sorted end
 	}