Patch to remove _Bool from type_traits.h

[Gabriel Dos Reis]

"Stephen M. Webb" <stephen@bregmasoft.com> writes:

| This is a quick patch that removes the symbol _Bool from libstdc++
| type_traits.h.  Causes no change in the testsuite results using today's CVS.
| 
| 2001-10-16  Stephen M. Webb  <stephen@bregmasoft.com>
| 
| 	* include/bits/type_traits.h: Removed definition and use of _Bool.

On which plateforms was it tested?  Otherwise OK for mainline.

-- Gaby
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