ImageRemovalBot is a bot, a computer program designed to perform simple, repetitive tasks. Any comments should be directed to Carnildo, the owner of this bot.
The simple answer: I didn't. Someone else did.
The full answer: If you're coming here to ask about an image, it probably was deleted because you forgot to note where you got the image from, or you forgot to indicate the copyright status of the image. See Wikipedia:Image use policy for more information on what you need to do when uploading images.
The image is not under a free license. There are three things that the image creator needs to permit for an image to be under a free license:
A permission to copy covers #1, but does not permit #2 (which is what lets Wikipedia use it in an article), and does not permit #3 (which is what permits us to distribute Wikipedia, and what permits people to re-use Wikipedia content).
Simple permission is not good enough. The image owner could revoke permission at any time, and the image can't be reused anywhere else: not in Wiktionary, not in Wikibooks, and possibly not in the other languages Wikipedia is available in. It also prevents people from re-using Wikipedia content. Wikipedia is a free content encyclopedia, so any image should be under a free license. Simple permission fails all three points of what constitutes a free license.
The Wikimedia Foundation, the organization that runs Wikipedia, is registered as a non-profit organization. That doesn't mean it's noncommercial, though: the German Wikipedia, for example, sells copies of the encyclopedia on CD-ROM as a fundraising measure. Further, Wikipedia is a free content encyclopedia, so any image should be under a free license. Any license with a "no commercial use" clause fails all three points of what constitutes a free license.
Wikipedia articles are intended to educate, yes. But "educational purposes" is a very vague term. The creator of the image could mean that they only want the image to be used by universities and the like, or they might object to Wikipedia's coverage of popular culture. It's best to stay away from images with such vague terms.
Further, Wikipedia is a free content encyclopedia, so any image should be under a free license. Any license with an "educational use only" clause fails all three points of what constitutes a free license.
Wrong. In the United States, under the Berne Convention Implementation Act of 1988, every tangible work of creative effort created after March 1, 1989 is automatically copyrighted. Including a copyright statement gives you a stronger position if you file a copyright infringement lawsuit, and you need to register your copyright with the Library of Congress to file the lawsuit, but neither step is needed to get a copyright in the first place.
Wrong. Anyone can see a book in a public library, or a painting in an art gallery, but that doesn't mean those are in the public domain. The Internet is no different.
Wrong. In the United States, copyright lasts a very long time. As a rule of thumb, everything published in 1929 or later is copyrighted.