Remove unused sbt plugin setting

Author: jonas

sbt-scala-native-bindgen/src/main/scala/org/scalanative/bindgen/sbt/ScalaNativeBindgenPlugin.scala

@@ -132,7 +132,6 @@ object ScalaNativeBindgenPlugin extends AutoPlugin {
         },
         nativeBindgenPackage := None,
         nativeBindgenExclude := None,
-        resourceDirectories in nativeBindgen := resourceDirectories.value,
         sourceGenerators += Def.task { Seq(nativeBindgen.value) },
         name in nativeBindgen := "ScalaNativeBindgen",
         nativeBindgen := {