Redmine

This patch removes the avatars-on and avatars-off classes that were added to the body element.

These classes were introduced in revision r16903 to switch CSS styles depending on whether Gravatar icons were enabled or disabled. However, since Redmine 6.1.0, when Gravatar is disabled, user initials are shown instead (#29824). As a result, the layout is now the same regardless of the Gravatar setting, and these CSS adjustments are no longer needed.

In addition, the avatars-on / avatars-off classes no longer accurately represent the current state, because even when the avatars-off class is added to the body element, initial icons are still displayed.