remove package:shelf_packages_handler dependency_overrides (#243)

diff --git a/pkgs/shelf_packages_handler/pubspec.yaml b/pkgs/shelf_packages_handler/pubspec.yaml
index 134f5d2..2b8bbbc 100644
--- a/pkgs/shelf_packages_handler/pubspec.yaml
+++ b/pkgs/shelf_packages_handler/pubspec.yaml
@@ -14,7 +14,3 @@
 dev_dependencies:
   lints: ^1.0.0
   test: ^1.16.0
-
-dependency_overrides:
-  shelf_static: ^1.0.0
-  test: ^1.16.0