I used old version of Audition CC , and recently installed Audition CC 2018. I can't find spectral pan feature anymore.
Is this feature removed in Audition CC 2018 ?
No, it was removed rather earlier than that! The last version it was in was Audition 3. The reason that it's gone is that FWIW, the 'information' that it gives you is pretty much useless. The only useful view is spectral frequency, and that of course is still there. They were nice pictures though...