Revert "Add method for multiplication of a Matrix by an Array{Grad}"

This reverts commit 36ab6c6.

KomaMRIBase/src/datatypes/sequence/Grad.jl

@@ -226,13 +226,6 @@ Base.zero(::Type{Grad}) = Grad(0.0, 0.0)
 # Rotation
 Base.zero(::Grad) = Grad(0.0, 0.0)
 *(α::Real, x::Grad) = Grad(α * x.A, x.T, x.rise, x.fall, x.delay)
-*(α::Matrix, x::Array{Grad}) = begin
-    y = deepcopy(x)
-    for (i, g) in enumerate(y)
-        g.A = (α*x.A)[i]
-    end
-    return y
-end
 +(x::Grad, y::Grad) = Grad(x.A .+ y.A, max(x.T, y.T), max(x.rise, y.rise), max(x.fall, y.fall), max(x.delay, y.delay)) #TODO: solve this in a better way (by "stacking" gradients) issue #487
 # Others
 *(x::Grad, α::Real) = Grad(α * x.A, x.T, x.rise, x.fall, x.delay)