Remove CandRefHelper.cc, seems to be not used.

[ghost]

Spotted this file trying to fix some warnings going off when compiling on gcc490.
It gives a warning on this file of the kind "Unused function", but probably the compiler misunderstand the statement of the class thinking it's actually a function.
Previous compilers didn't spot this, @vadler should we remove this file or can you find a fix for it?

[cmsbuild]

A new Pull Request was created by @Degano (Alessandro Degano) for CMSSW_7_1_X.

Remove CandRefHelper.cc, seems to be not used.

It involves the following packages:

PhysicsTools/PatUtils

@nclopezo, @vadler, @cmsbuild, @Degano, @monttj can you please review it and eventually sign? Thanks.
@TaiSakuma, @nhanvtran this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2674/318/summary.html

[vadler]

+1
This file only tested compilation back in 2008 (s. inlined comment). Farewell....

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). @nclopezo, @ktf can you please take care of it?