It’s hard to miss the giant “Hoya Saxa” mural while driving past Georgetown University on Canal Road NW. The mural has been an institution since it appeared on the wall sometime in the early 1990s, yet some, such as Barbara Zartman, vice president of the Citizens Association of Georgetown, say the mural is “grafitti” and should be removed. Well, it looks like that won’t be happening anytime soon. The West End Guide reports that at…