[system image] Migrate boringssl_tests to pkgfs

Change-Id: I7c152391fbf411b18aeefadfa414f1c25e0b740b
Tested: affected tests ran successfully out of pkgfs
Bug: PKG-46
diff --git a/BUILD.gn b/BUILD.gn
index a51b784..3bc6b34 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -143,7 +143,6 @@
 if (is_fuchsia) {
   package("boringssl_tests") {
     testonly = true
-    deprecated_system_image = true
     deps = [
       ":crypto_test",
       ":ssl_test",