Remove misleading comment (b/26948053)

Vold is considered part of our trusted computing base, and
compromising vold is already identified as a complete device
compromise. While storing keys only in the kernel would be better, the
current setup does not introduce a security bug or worsen any security
control.

Bug: 26948053
Test: Comment-only change.
Change-Id: Ib5436f4386769ec44b74dc6b50fbcc0fed99b96b
1 file changed