Only remove js dir if it exists. (#88)

* Only remove js dir if it exists.

This is to fix a bug where scittle throws an error if you do a prod build on a fresh checkout.

* Update changelog.

* Simplify clean prod fix.

CHANGELOG.md

@@ -10,6 +10,7 @@
 <!-- - `bb gh-pages` -->
 
 - [#89](https://github.com/babashka/babashka/issues/89): allow `evaluate_script_tags` to specify individual scripts.
+- [#87](https://github.com/babashka/scittle/issues/87): prod build on fresh checkout fails
 
 ## v0.6.19 (2024-10-08)
 

bb.edn

@@ -13,7 +13,7 @@
              [babashka.process :as p :refer [process]])
 
   clean {:doc "Start from clean slate."
-         :task (do (run! fs/delete (fs/list-dir (fs/file "resources" "public" "js") "**.*"))
+         :task (do (fs/delete-tree (fs/file "resources" "public" "js"))
                    (fs/delete-tree ".cpcache")
                    (fs/delete-tree ".shadow-cljs"))}