BhobUGens: Remove duplicate variable 'h'

[dyfer]

Recent develop version of SC (3.15-dev as of January 2026) complains about this and the interpreter quits:

compiling class library...
	Found 875 primitives.
...
ERROR: Found duplicate instance variable name 'h'
  in file '<...>/SC3plugins/BhobUGens/classes/ChaosPatterns.sc'
  line 46 char 44:

  	var <>s, <>r, <>b, <>h, <>x, <>y, <>z, <>h;
                                              
  	*new {|s=10, r=28, b=2.66666666667, h=0.01, x=0.090879182417163, y=2.97077458055, z=24.282041054363|
-----------------------------------
Library has not been compiled successfully.
Interpreter has crashed or stopped forcefully.

[JordanHendersonMusic]

This is good, that code made no sense before!