The license states that you must attribute the work (software) in the form of the author's (developer's) choosing. The links are a form of attribution, and is what the license is talking about when referring to the software.

From Creative Common's Attribution 3.0 license page (http://creativecommons.org/licenses/by/3.0/):

Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).

The see more key words here are "in the manner specified by the author or licensor," which means the work can be attributed in any form at the choosing of the author, which can include a footer (which is actually what many software also under this license use), or whatever else they prefer.

You're basically referring to nulling the script, which is a big no-no and any discussion of the sorts shouldn't even be allowed on this site (there are other sites of questionable characters which are dedicated to this, but they will not be named here). It doesn't matter if you meant to do this for commercial purposes or not. I know how to null this software with a single line of code, but refuse to do so out of respect for the developers and their business. I only ask you hold the same respect, along with everyone else.

In short: no, it is not legally correct to do this, nor ethically, for that matter.