Update NEWS

Author: ericphanson

NEWS.md

@@ -1,7 +1,6 @@
 # Changes in v0.13.1
 
 * Allow disabling DCP warnings ([#372](https://github.com/JuliaOpt/Convex.jl/pull/372))
-* Make printing constants `Convex.MAXDEPTH` and `Convex.MAXWIDTH` atomic ([#372](https://github.com/JuliaOpt/Convex.jl/pull/372))
 * Restore export of `Constraint` ([#371](https://github.com/JuliaOpt/Convex.jl/pull/371))
 
 # Major changes in v0.13.0