Remove FileAccess.isHidden method

base/src/main/kotlin/de/staropensource/engine/base/utility/FileAccess.kt

@@ -376,23 +376,6 @@ class FileAccess {
         }
     }
 
-    /**
-     * Returns if this file or
-     * directory is hidden.
-     *
-     * @return is hidden?
-     * @throws IOAccessException on IO error
-     * @since v1-alpha10
-     */
-    @Throws(IOAccessException::class)
-    fun isHidden(): Boolean {
-        try {
-            return Files.isHidden(path)
-        } catch (exception: Exception) {
-            throw IOAccessException("Checking if '${unformatFromPath(path)}' is hidden failed", exception)
-        }
-    }
-
     /**
      * Returns if this file can be read from.
      *