cubicweb-squareui #3553532 Cleaning code [validation pending]

remove a trailing print

prioritynormal
typebug
done in0.3.0
load0.100
load left0.000
closed by#9d85cd2fb37b Remove left-over print (from e912f1af89b2)
patchRemove left-over print (from e912f1af89b2) [applied]