JS: kill some static performance counters in ConvexHull
JS: kill some static performance counters in ConvexHull

We never write these out and they are not thread safe.

Signed-off-by: Harvey Harrison <eadbd6b462bf3c97df0300a934c12bc2e5d1fe51@gmail.com>

jaamsim/jaamsim,jaamsim/jaamsim,jaamsim/jaamsim,jaamsim/jaamsim