Delete .test_config (dart-lang/glob#43)

diff --git a/pkgs/glob/.test_config b/pkgs/glob/.test_config
deleted file mode 100644
index 531426a..0000000
--- a/pkgs/glob/.test_config
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "test_package": {
-    "platforms": ["vm"]
-  }
-}
\ No newline at end of file