Merge pull request #2199 from michaellilltokiwa/remove-unused-method-…

…depth

remove unused method `Clazz.depth`

src/dev/flang/air/Clazz.java

@@ -2092,22 +2092,6 @@ public Clazz resultClazz()
   }
 
 
-  /**
-   * Determine the nesting level of a given feature f. The nesting level is 0
-   * for the universe, 1 for any feature declared in the universe, and
-   * depth(f.outer())+1 for all the rest.
-   */
-  private int depth(AbstractFeature f)
-  {
-    if (CHECKS) check
-      (Errors.any() || f.isUniverse() || f.outer() != null);
-
-    return f.isUniverse() || (f.outer() == null)
-      ? 0
-      : depth(f.outer()) + 1;
-  }
-
-
   /**
    * For a type clazz such as 'i32.type' return its name, such as 'i32'.
    */