Media Gallery should not create a menu item in the main menu. That menu is for users to manage, and should not have items injected into it by modules like this just because they are installed.
+1, and it's not worth adding an update script to remove it as site maintainers/builders can already delete/disable the item if they need to.
Closed a duplicate: #2169649: Do not create a Main menu link for 'Galleries'
Looks like we've got about four upvotes for this between this thread and the duplicate. I'll leave this RTBC for a few days and if no one chimes in otherwise, I'll commit it.
This no longer applies:https://www.drupal.org/node/1855276
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