[auth] remove hex for LinkedIn icon. (#5727)

Closes #5722 
Fix LinkedIn icon rendering by removing unwanted hex code.

Before:


![image](https://github.com/user-attachments/assets/32bd8b2b-e92b-47fb-918e-c7a8fc0ae735)
This commit is contained in:
Neeraj 2025-04-28 09:22:19 +05:30 committed by GitHub
commit 2ce4e8e955
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@ -625,8 +625,7 @@
},
{
"title": "LinkedIn",
"slug": "linkedin",
"hex": "2596be"
"slug": "linkedin"
},
{
"title": "Linux.Do",