I need to clarify one thing. When we discontinue a module of a web site, we do not remove it and we just redirect it to some other website. But may be after serveral years, we may remove it then at this stage, will it affect redirection from removed module to the redirected website?

Let me make it simple by the following example.

If I used this URL www.aabbcc.com for 4 years and all my incoming links are linked to it. Now I changed my URL to www.ccddeeff.com. I applied 301 redirect from www.aabbcc.com to www.ccddeeff.com. Currently, this scenario is working fine But what If I remove this page (or module) www.aabbcc.com permanently. Will the traffic still be redirected from www.aabbcc.com to www.ccddeeff.com? Or do i need to keep www.aabbcc.com for always?