Remove pool clearing.  We've only ever cleared one of three pools and there's
no good reason to do it.  Instead just reset the entropy count.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>