Reword disabling signature section of README
Reword disabling signature section of README

Make it clear that this shouldn't be necessary, even for proprietary
repos.

Change-Id: Ica4bb5d8d38e17d2047a4cc384e6afbef45b4dcb
Reviewed-on: http://gerrit.causes.com/37396
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

oxocode/overcommit,blech75/overcommit,gnagel/overcommit,gnagel/overcommit,blech75/overcommit,TheSooth/overcommit,TheSooth/overcommit,oxocode/overcommit