Revert "Implement Jekyll"

This reverts commit 35e4717740.

_site/luhn-algorithm/script.js

@@ -1,34 +0,0 @@
-document.addEventListener("keyup", function(event) {
-    // stop any code that may normally run when enter key pressed
-    event.preventDefault();
-    // if enter key is pressed, run Luhn algorithm
-    if (event.keyCode === 13) {
-        checkNumber();
-    } else {
-        // if number in input field is being edited, remove previous number evaluation message
-        $("#validation_message").html(null);
-    }
-});
-
-// function for validating number entered with Luhn algorithm
-function checkNumber() {
-    // define input string and remove non-numerical characters
-    var input = document.getElementsByTagName("input")[0].value.replace(/\D/g,'');;
-    // check string isn't empty
-    if (input) {
-        // retrieve digits & reverse
-        var digits = document.getElementsByTagName("input")[0].value.split("").reverse(), sum = 0;
-        digits.forEach(function(currentDigit, index) {
-            newDigit = Number(currentDigit);
-            if (index % 2 == 1) {
-                if ((newDigit *= 2) > 9) {
-                    newDigit -= 9;
-                }
-            }
-            sum += newDigit;
-        });
-
-        // displays evaluation message
-        $("#validation_message").html(((sum % 10) == 0) ? "Number is valid" : "Number is invalid");
-    }
-}