Update test/units.jl

Author: ChrisRackauckas

test/units.jl

@@ -4,7 +4,7 @@ MT = ModelingToolkit
 
 # All unit functions are now directly available from ModelingToolkit
 # Extension automatically loads when Unitful is imported
-const unitless = ModelingToolkit.DQ.Quantity(1.0)
+unitless = Unitful.unit(1)
 @independent_variables t [unit = u"ms"]
 @parameters τ [unit = u"ms"] γ
 @variables E(t) [unit = u"kJ"] P(t) [unit = u"MW"]