Fix some imports

src/components/components.jl

@@ -6,7 +6,7 @@ include("pulses/pulses.jl")
 include("readouts/readouts.jl")
 
 import .AbstractTypes: BaseComponent, GradientWaveform, EventComponent, RFPulseComponent, ReadoutComponent
-import .GradientWaveforms: ConstantGradientBlock, ChangingGradientBlock, NoGradientBlock
+import .GradientWaveforms: ConstantGradient, ChangingGradient, NoGradient
 import .InstantGradients: InstantGradient1D, InstantGradient3D
 import .Pulses: GenericPulse, InstantRFPulse, SincPulse, ConstantPulse
 import .Readouts: ADC, SingleReadout

src/components/readouts/ADCs.jl

@@ -2,7 +2,7 @@ module ADCs
 import JuMP: @constraint
 import ...AbstractTypes: ReadoutComponent
 import ....BuildSequences: global_model, fixed
-import ....Variables: oversample, nsamples, dwell_time, duration, time_to_center, effective_time, resolution, VariableType, apply_simple_constraint!, set_simple_constraints!, get_free_variable, make_generic
+import ....Variables: oversample, nsamples, dwell_time, duration, effective_time, resolution, VariableType, apply_simple_constraint!, set_simple_constraints!, get_free_variable, make_generic
 
 
 """