Update the structure of the chapter

of binary tree.

docs/chapter_stack_and_queue/queue.md

@@ -596,12 +596,6 @@ comments: true
                 throw new EmptyStackException();
             return nums[front];
         }
-        /* 访问指定索引元素 */
-        int get(int index) {
-            if (index >= size())
-                throw new IndexOutOfBoundsException();
-            return nums[(front + index) % capacity()];
-        }
     }
     ```
 
@@ -659,12 +653,6 @@ comments: true
                 throw out_of_range("队列为空");
             return nums[front];
         }
-        /* 访问指定位置元素 */
-        int get(int index) {
-            if (index >= size())
-                throw out_of_range("索引越界");
-            return nums[(front + index) % capacity()]
-        }
     };
     ```
 
@@ -715,13 +703,6 @@ comments: true
                 return False
             return self.__nums[self.__front]
 
-        """ 访问指定位置元素 """
-        def get(self, index):
-            if index >= self.size():
-                print("索引越界")
-                return False
-            return self.__nums[(self.__front + index) % self.capacity()]
-
         """ 返回列表用于打印 """
         def to_list(self):
             res = [0] * self.size()
@@ -837,12 +818,6 @@ comments: true
                 throw new Error("队列为空");
             return this.#queue[this.#front];
         }
-        /* 访问指定索引元素 */
-        get(index) {
-            if (index >= this.size)
-                throw new Error("索引越界");
-            return this.#queue[(this.#front + index) % this.capacity];
-        }
     }
     ```
 
@@ -893,12 +868,6 @@ comments: true
                 throw new Error("队列为空");
             return this.queue[this.front];
         }
-        /* 访问指定索引元素 */
-        get(index: number): number {
-            if (index >= this.size)
-                throw new Error("索引越界");
-            return this.queue[(this.front + index) % this.capacity];
-        }
     }
     ```
 

docs/chapter_stack_and_queue/stack.md

@@ -451,12 +451,6 @@ comments: true
                 throw new EmptyStackException();
             return stack.get(size() - 1);
         }
-        /* 访问索引 index 处元素 */
-        public int get(int index) {
-            if (index >= size())
-                throw new EmptyStackException();
-            return stack.get(index);
-        }
     }
     ```
 
@@ -493,12 +487,6 @@ comments: true
                 throw out_of_range("栈为空");
             return stack.back();
         }
-        /* 访问索引 index 处元素 */
-        int get(int index) {
-            if(index >= size())
-                throw out_of_range("索引越界");
-            return stack[index];
-        }
     };
     ```
 
@@ -531,11 +519,6 @@ comments: true
         def peek(self):
             assert not self.is_empty(), "栈为空"
             return self.__stack[-1]
-
-        """ 访问索引 index 处元素 """
-        def get(self, index):
-            assert index < self.size(), "索引越界"
-            return self.__stack[index]
     ```
 
 === "Go"
@@ -617,12 +600,6 @@ comments: true
                 throw new Error("栈为空");
             return this.stack[this.stack.length - 1];
         }
-        /* 访问索引 index 处元素 */
-        get(index) {
-            if (index >= this.size)
-                throw new Error("索引越界");
-            return this.stack[index];
-        }
     };
     ```
 
@@ -659,12 +636,6 @@ comments: true
                 throw new Error('栈为空');
             return this.stack[this.stack.length - 1];
         }
-        /* 访问索引 index 处元素 */
-        get(index: number): number | undefined {
-            if (index >= this.size)
-                throw new Error('索引越界');
-            return this.stack[index];
-        }
     };
     ```