sponsor update

Author: ErikaKK

data/sponsors.json

@@ -31,12 +31,6 @@
     "logo": "/sponsors/venture_horizontal_logo.png",
     "link": "https://www.venture-student-innovation.com/"
   },
-  {
-    "name": "U Group",
-    "alt": "U Group",
-    "logo": "/sponsors/u_group_logo.png",
-    "link": "https://www.theugroup.co/"
-  },
   {
     "name": "IMC",
     "alt": "IMC logo",