Delete the jar directories in the gradle clean task.

build.gradle.kts

@@ -145,6 +145,10 @@ allprojects {
 }
 
 tasks {
+    listOf(
+        file("remappedJars"),
+        file("shrinkedJars")
+    ).forEach { if (it.exists()) clean.get().delete.add(it) }
     val publishToModrinth = register<com.modrinth.minotaur.TaskModrinthUpload>("publishtoModrinth") {
         val envStr: String? = System.getenv("MODRINTH")
         onlyIf { envStr != null }