internal/poll: remove unused poll.pollDesc methods
internal/poll: remove unused poll.pollDesc methods

Change-Id: Ic2b20c8238ff0ca5513d32e54ef2945fa4d0c3d2
Reviewed-on: https://go-review.googlesource.com/37033
Run-TryBot: Dave Cheney <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@cheney.net>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

golang/go,polyverse-security/go,polyverse-security/go,Cofyc/go,golang/go,derekmarcotte/go,linux-on-ibm-z/go,codestation/go,nawawi/go,vsekhar/elastic-go,josharian/go,derekmarcotte/go,ImJasonH/go,Cofyc/go,nawawi/go,akutz/go,vsekhar/elastic-go,vsekhar/elastic-go,nawawi/go,linux-on-ibm-z/go,CAFxX/go,golang/go,Cofyc/go,derekmarcotte/go,vsekhar/elastic-go,akutz/go,linux-on-ibm-z/go,CAFxX/go,Cofyc/go,christopher-henderson/Go,CAFxX/go,linux-on-ibm-z/go,derekmarcotte/go,josharian/go,linux-on-ibm-z/go,polyverse-security/go,derekmarcotte/go,polyverse-security/go,linux-on-ibm-z/go,nawawi/go,vsekhar/elastic-go,linux-on-ibm-z/go,cloudflare/go,nawawi/go,linux-on-ibm-z/go,CAFxX/go,CAFxX/go,akutz/go,golang/go,akutz/go,cloudflare/go,vsekhar/elastic-go,akutz/go,josharian/go,derekmarcotte/go,josharian/go,polyverse-security/go,ImJasonH/go,cloudflare/go,vsekhar/elastic-go,codestation/go,golang/go,derekmarcotte/go,Cofyc/go,josharian/go,ImJasonH/go,akutz/go,Cofyc/go,ImJasonH/go,golang/go,polyverse-security/go,derekmarcotte/go,josharian/go,cloudflare/go,CAFxX/go,cloudflare/go,codestation/go,Cofyc/go,CAFxX/go,cloudflare/go,nawawi/go,cloudflare/go,golang/go,Cofyc/go,ImJasonH/go,CAFxX/go,nawawi/go,codestation/go,golang/go,akutz/go,akutz/go,vsekhar/elastic-go,codestation/go,ImJasonH/go,josharian/go,ImJasonH/go,codestation/go,josharian/go,polyverse-security/go,polyverse-security/go,codestation/go,codestation/go,nawawi/go,cloudflare/go,ImJasonH/go