fix broken import from an unhappy rebase

config.json

 {
   "AssemblyTag":"assemblyname",
-  "Assemblies":["test", "metalab"],
+  "Assemblies":[],
   "ScriptInject":null,
   "AllowScripts":false,
   "MaxLintLevel":"Warning",

lib/CheckDir.hs

@@ -18,7 +18,7 @@ import           Data.Foldable          (fold)
 import           Data.Functor           ((<&>))
 import           Data.Map               (Map, elems, keys)
 import qualified Data.Map               as M
-import           Data.Map.Strict        (mapKeys, (\\))
+import           Data.Map.Strict        (mapKeys, (\\), mapWithKey)
 import           Data.Maybe             (mapMaybe)
 import           Data.Text              (Text)
 import qualified Data.Text              as T