Removing the 'Time Estimate Box' from bugzilla UI

Hi,

I'm working on some bugzilla improvements/cleanups discussed in this thread:
https://groups.google.com/forum/#!topic/llvm-dev/Exo_4k0yAQ0

I wrote a query to see how much the 'Time Estimate Box' has been used and
it looks like it's only ever been modified for 11 bugs in the history of
bugzilla. Any objections to removing this from the UI?

-Tom

SGTM.