[time.clock.system.members] Remove extraneous vertical space.

Author: zygoloid

source/time.tex

@@ -2652,7 +2652,7 @@
 \begin{itemdescr}
 \pnum
 \constraints
-\tcode{system_clock::duration::min() < system_clock::duration::zero()} is \tcode{true}. \\
+\tcode{system_clock::duration::min() < system_clock::duration::zero()} is \tcode{true}.
 \begin{note}
 This implies that \tcode{rep} is a signed type.
 \end{note}