Removed `jsonFileInfo()` implementation from files.hpp.
Removed `jsonFileInfo()` implementation from files.hpp.

Review: https://reviews.apache.org/r/49529/

verizonlabs/mesos,verizonlabs/mesos,Gilbert88/mesos,neilconway/mesos,chhsia0/mesos,asamerh4/mesos,Gilbert88/mesos,zmalik/mesos,andschwa/mesos,Aman-Jain-14/customizedMesos,jpeach/mesos,abudnik/mesos,kaysoky/mesos,yuquanshan/customizedMesos,Aman-Jain-14/customizedMesos,craimbert/mesos,Gilbert88/mesos,chhsia0/mesos,craimbert/mesos,neilconway/mesos,jpeach/mesos,asamerh4/mesos,abudnik/mesos,gsantovena/mesos,reneploetz/mesos,dforsyth/mesos,chhsia0/mesos,craimbert/mesos,jpeach/mesos,verizonlabs/mesos,Gilbert88/mesos,zmalik/mesos,chhsia0/mesos,gsantovena/mesos,dforsyth/mesos,kaysoky/mesos,jpeach/mesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,Gilbert88/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,kaysoky/mesos,yuquanshan/customizedMesos,yuquanshan/customizedMesos,neilconway/mesos,reneploetz/mesos,craimbert/mesos,yuquanshan/customizedMesos,neilconway/mesos,kaysoky/mesos,asamerh4/mesos,Gilbert88/mesos,gsantovena/mesos,verizonlabs/mesos,andschwa/mesos,zmalik/mesos,dforsyth/mesos,verizonlabs/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,jpeach/mesos,craimbert/mesos,verizonlabs/mesos,abudnik/mesos,dforsyth/mesos,kaysoky/mesos,andschwa/mesos,kaysoky/mesos,craimbert/mesos,andschwa/mesos,jpeach/mesos,asamerh4/mesos,gsantovena/mesos,reneploetz/mesos,yuquanshan/customizedMesos,dforsyth/mesos,andschwa/mesos,chhsia0/mesos,dforsyth/mesos,asamerh4/mesos,zmalik/mesos,verizonlabs/mesos,gsantovena/mesos,neilconway/mesos,reneploetz/mesos,jpeach/mesos,yuquanshan/customizedMesos,chhsia0/mesos,asamerh4/mesos,zmalik/mesos,reneploetz/mesos,chhsia0/mesos,zmalik/mesos,neilconway/mesos,reneploetz/mesos,andschwa/mesos,craimbert/mesos,asamerh4/mesos,kaysoky/mesos,andschwa/mesos,yuquanshan/customizedMesos,gsantovena/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,Gilbert88/mesos,abudnik/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,abudnik/mesos