Remove a spurious use of std::bind.
Remove a spurious use of std::bind.

If it's just a plain old function with an identical signature, no need
for std::bind, it *just is* an std::function!

phad/certificate-transparency,eranmes/certificate-transparency,taknira/certificate-transparency,benlaurie/certificate-transparency,kyprizel/certificate-transparency,eranmes/certificate-transparency,kyprizel/certificate-transparency,kyprizel/certificate-transparency,AlCutter/certificate-transparency,katjoyce/certificate-transparency,katjoyce/certificate-transparency,katjoyce/certificate-transparency,benlaurie/certificate-transparency,lexibrent/certificate-transparency,lexibrent/certificate-transparency,google/certificate-transparency,katjoyce/certificate-transparency,eranmes/certificate-transparency,phad/certificate-transparency,google/certificate-transparency,katjoyce/certificate-transparency,RJPercival/certificate-transparency,taknira/certificate-transparency,AlCutter/certificate-transparency,pphaneuf/certificate-transparency,lexibrent/certificate-transparency,eranmes/certificate-transparency,grandamp/certificate-transparency,RJPercival/certificate-transparency,katjoyce/certificate-transparency,pphaneuf/certificate-transparency,AlCutter/certificate-transparency,kyprizel/certificate-transparency,kyprizel/certificate-transparency,benlaurie/certificate-transparency,RJPercival/certificate-transparency,AlCutter/certificate-transparency,pphaneuf/certificate-transparency,benlaurie/certificate-transparency,google/certificate-transparency,taknira/certificate-transparency,benlaurie/certificate-transparency,kyprizel/certificate-transparency,kyprizel/certificate-transparency,eranmes/certificate-transparency,AlCutter/certificate-transparency,RJPercival/certificate-transparency,AlCutter/certificate-transparency,taknira/certificate-transparency,lexibrent/certificate-transparency,taknira/certificate-transparency,pphaneuf/certificate-transparency,google/certificate-transparency,katjoyce/certificate-transparency,benlaurie/certificate-transparency,eranmes/certificate-transparency,grandamp/certificate-transparency,taknira/certificate-transparency,grandamp/certificate-transparency,eranmes/certificate-transparency,grandamp/certificate-transparency,taknira/certificate-transparency,AlCutter/certificate-transparency,phad/certificate-transparency,phad/certificate-transparency,benlaurie/certificate-transparency