Remove detection of gcc 4.7. We don't even support that compiler anymore.
Remove detection of gcc 4.7. We don't even support that compiler anymore.

lordofhyphens/Slic3r,pieis2pi/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,alexrj/Slic3r,curieos/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,lordofhyphens/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r,curieos/Slic3r,alexrj/Slic3r,curieos/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r