[Main Page] Redundant functionality, in News block, link "всі новини"

**Steps to reproduce**
1. Go to Main Page, News block
2. Click on 'всі новини'

**Actual result**
We are redirecting to the Instagram page, but this is redundant functionality.

**Expected result**
No link "всі новини" available

**User story and test case links**
E.g.: "User story #100
[Test case](https://jira.softserve.academy/browse/100)"