Removing old questions

Removed questions uploaded using an old version of LeetHub
Questions 2,3,4,19,36,141,206

141-linked-list-cycle/141-linked-list-cycle.py

@@ -1,22 +0,0 @@
-# Definition for singly-linked list.
-# class ListNode(object):
-#     def __init__(self, x):
-#         self.val = x
-#         self.next = None
-
-class Solution(object):
-    def hasCycle(self, head):
-        """
-        :type head: ListNode
-        :rtype: bool
-        """
-        if head == None or head.next == None: return False
-        myDict = {head: 0}
-        point = head
-        while True:
-            point = point.next
-            if point == None: return False
-            if myDict.get(point) == None:
-                myDict[point] = 0
-            else:
-                return True