fix billryan#121 remove 404 pages

Author: billryan

zh-hans/SUMMARY.md

@@ -33,7 +33,6 @@
        * [Greatest Common Divisor](basics_algorithm/math/gcd.md)
        * [Prime](basics_algorithm/math/prime.md)
    * [Knapsack](basics_algorithm/knapsack.md)
-   * [Counting Problem](basics_algorithm/counting_problem.md)
    * [Probability](basics_algorithm/probability/README.md)
        * [Shuffle](basics_algorithm/probability/shuffle.md)
    * [Bitmap](basics_algorithm/bitmap.md)
@@ -131,7 +130,6 @@
    * [Sort List](linked_list/sort_list.md)
    * [Insertion Sort List](linked_list/insertion_sort_list.md)
    * [Palindrome Linked List](linked_list/palindrome_linked_list.md)
-   * [Delete Node in the Middle of Singly Linked List](linked_list/delete_node_in_the_middle_of_singly_linked_list.md)
    * [LRU Cache](linked_list/lru_cache.md)
    * [Rotate List](linked_list/rotate_list.md)
    * [Swap Nodes in Pairs](linked_list/swap_nodes_in_pairs.md)
@@ -203,7 +201,6 @@
    * [Maximum Subarray II](dynamic_programming/maximum_subarray_ii.md)
    * [Longest Increasing Continuous subsequence](dynamic_programming/longest_increasing_continuous_subsequence.md)
    * [Longest Increasing Continuous subsequence II](dynamic_programming/longest_increasing_continuous_subsequence_ii.md)
-   * [Egg Dropping Puzzle](dynamic_programming/egg_dropping_puzzle.md)
    * [Maximal Square](dynamic_programming/maximal_square.md)
 * [Graph](graph/README.md)
    * [Find the Connected Component in the Undirected Graph](graph/find_the_connected_component_in_the_undirected_graph.md)
@@ -217,7 +214,6 @@
    * [Sliding Window Maximum](data_structure/sliding_window_maximum.md)
    * [Longest Words](data_structure/longest_words.md)
    * [Heapify](data_structure/heapify.md)
-   * [Kth Smallest Number in Sorted Matrix](data_structure/kth_smallest_number_in_sorted_matrix.md)
 * [Big Data](bigdata/README.md)
    * [Top K Frequent Words (Map Reduce)](bigdata/top_k_frequent_words_map_reduce.md)
    * [Top K Frequent Words](bigdata/top_k_frequent_words.md)
@@ -237,8 +233,6 @@
    * [Reverse Integer](problem_misc/reverse_integer.md)
    * [Gray Code](problem_misc/gray_code.md)
    * [Find the Missing Number](problem_misc/find_the_missing_number.md)
-   * [N Queens](problem_misc/n_queens.md)
-   * [N Queens II](problem_misc/n_queens_ii.md)
    * [Minimum Window Substring](problem_misc/minimum_window_substring.md)
    * [Continuous Subarray Sum](problem_misc/continuous_subarray_sum.md)
    * [Continuous Subarray Sum II](problem_misc/continuous_subarray_sum_ii.md)
@@ -264,10 +258,5 @@
 * [Appendix I Interview and Resume](appendix_i_interview_and_resume/README.md)
    * [Interview](appendix_i_interview_and_resume/interview.md)
    * [Resume](appendix_i_interview_and_resume/resume.md)
-* [Appendix II System Design](appendix_ii_system_design/README.md)
-   * [The System Design Process](appendix_ii_system_design/the_system_design_process.md)
-   * [Statistics](appendix_ii_system_design/statistics.md)
-   * [System Architecture](appendix_ii_system_design/system_architecture.md)
-   * [Scalability](appendix_ii_system_design/scalability.md)
 * [Tags](tags.md)