Two similar cards fixed fixes #328 (#329)

* Aditya kumar removed

* Set theme jekyll-theme-cayman

* Delete _config.yml

Author: LalitSharma7

data/participants.json

@@ -999,16 +999,7 @@
 		    "twitter": "",
 		    "referral": "Instagram"
 		},
-		{
-		    "name": "Aditya Kumar",
-		    "imageurl": "assets/img/participants/devill71.jpg",
-		    "about": "",
-		    "college": "IIIT A",
-		    "facebook": "",
-		    "github": "https://github.com/devill71",
-		    "twitter": "",
-		    "referral": ""
-		},
+		
 		{
 		    "name": "Suneet Kumar Makkar",
 		    "imageurl": "",