Remove extra styles for content blocks

[vegasgeek]

Backstory

During the course of working on a client project, it was found that we have a couple of extra styles attached to content blacks that aren't needed and were linked to some issues with the Safari browser. So, rather than have them there by default, we're going to remove them from the default and they can be added back in as needed (assuming no issues with Safari)

Scenario

As a WordPress Developer, I:

• review all files in the template-parts/content-blocks/ folder
• locate and remove instances of rev-Row--justifyCenter and display-flex in div containers