Delete Master-List.md; Remove debugger keyword from LNRString

Author: chrismejia

LeetCode/Attempting/Longest Non-repeating Substring/Longest Non-repeating Substring.js

@@ -3,7 +3,6 @@
 // ===================================
 
 function longestNonRepeatingSubString(string) {
-  debugger;
   // default case: if all chars in string are the same, len = 1
   let subStr = "";
   let subStrLen = 1;