Remove obsolete function insertchild

This function has been obsoleted by the previous commit. Remove it.

xdu.c

@@ -421,55 +421,6 @@ int compare(struct node* n1, struct node* n2, int order)
     return 0;
 }
 
-void insertchild(struct node* nodep, struct node* childp, int order)
-{
-    struct node *np,
-        *np1;
-
-    if (nodep == NODE_NULL || childp == NODE_NULL)
-        return;
-    if (childp->peer != NODE_NULL) {
-        fprintf(stderr, "xdu: can't insert child with peers\n");
-        return;
-    }
-
-    childp->parent = nodep;
-    if (nodep->child == NODE_NULL) {
-        /*
-	 * no children, order doesn't matter 
-	 */
-        nodep->child = childp;
-        return;
-    }
-    /*
-     * nodep has at least one child already 
-     */
-    if (compare(childp, nodep->child, order) < 0) {
-        /*
-	 * new first child 
-	 */
-        childp->peer = nodep->child;
-        nodep->child = childp;
-        return;
-    }
-    np1 = nodep->child;
-    for (np = np1->peer; np != NODE_NULL; np = np->peer) {
-        if (compare(childp, np, order) < 0) {
-            /*
-	     * insert between np1 and np 
-	     */
-            childp->peer = np;
-            np1->peer = childp;
-            return;
-        }
-        np1 = np;
-    }
-    /*
-     * at end, link new child on 
-     */
-    np1->peer = childp;
-}
-
 /*
  * add path as a child of top - recursively 
  */