fix: remove the x icon, use simple icons one

Author: prateekmedia

mobile/apps/auth/assets/custom-icons/_data/custom-icons.json

@@ -1774,10 +1774,7 @@
       ]
     },
     {
-      "title": "Twitter",
-      "altNames": [
-        "X"
-      ]
+      "title": "Twitter"
     },
     {
       "title": "Ubiquiti",
@@ -1919,12 +1916,6 @@
     {
       "title": "WYZE"
     },
-    {
-      "title": "X",
-      "altNames": [
-        "Twitter"
-      ]
-    },
     {
       "title": "Xbox",
       "hex": "107C10"