cleanup: remove 50% of offline images

src/features/background/offline_images.json

@@ -1,32 +1,17 @@
 {
   "Ryan Hutton": {
-    "photo": [2]
+    "photo": [1]
   },
   "Francesco De Tommaso": {
-    "photo": [3]
+    "photo": [2]
   },
   "Andy Vu": {
-    "photo": [4]
-  },
-  "Kevin Kurek": {
-    "photo": [5]
-  },
-  "Frank Mckenna": {
-    "photo": [6]
-  },
-  "Yuriy Bogdanov": {
-    "photo": [7]
+    "photo": [3]
   },
   "Sergi Ferrete": {
-    "photo": [9]
-  },
-  "Marcin Czerniawski": {
-    "photo": [10]
-  },
-  "Thomas Lipke": {
-    "photo": [11]
+    "photo": [4]
   },
   "Pixabay": {
-    "photo": [1, 8, 12]
+    "photo": [5]
   }
 }