auto: Remove unused pthread spinlock checks

When configuring under Linux we always got the following

  checking for pthread spinlock zero initial value ... found but is not working

Having *actually* taken a look at this, this check seems somewhat bogus,
the first thing it does is

  pthread_spinlock_t  lock = 0;

which you shouldn't do anyway, you should use pthread_spin_init(3) to
initialise the pthread_spinlock_t variable.

But in any case, this thing, NXT_HAVE_PTHREAD_SPINLOCK_ZERO, isn't even
checked for in the code.

Neither is NXT_HAVE_PTHREAD_SPINLOCK, we don't use the pthread_spin_*
API, but rather roll our own spinlock implementation.

So let's just remove these checks, at the very least it'll speed
./configure up!

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

0 files changed, 0 insertions, 0 deletions