Removing the demo entry

Author: iamwatchdogs

.github/data/contributors-log.json

@@ -7,16 +7,5 @@
       "1"
     ],
     "demo-path": "https://github.com/Grow-with-Open-Source/Java-Projects"
-  },
-  "Simple-Calculator": {
-    "contributor-name": [
-      "REC-SAM",
-      "iamwatchdogs"
-    ],
-    "pull-request-number": [
-      "3",
-      "4"
-    ],
-    "demo-path": "Simple-Calculator"
   }
-}
+}