[fuchsia-pkg] remove unnecessary deprecated_bare_package_url

the README already uses the full Fuchsia package URL

CF-323 #comment #done

TESTED=none

Change-Id: I57e4bb914560851657202091855c869b14ca31ca
diff --git a/bin/crasher_dart/BUILD.gn b/bin/crasher_dart/BUILD.gn
index b548876..c35b6c6 100644
--- a/bin/crasher_dart/BUILD.gn
+++ b/bin/crasher_dart/BUILD.gn
@@ -5,8 +5,6 @@
 import("//topaz/runtime/dart_runner/dart_app.gni")
 
 dart_app("crasher_dart") {
-  deprecated_bare_package_url = "//build"
-
   main_dart = "lib/main.dart"
 
   fuchsia_package_name = "crasher_dart"