follow the machine defaults for AA04 nozzles

The machine defaults are already geared towards the use of AA0.4 nozzles. PP-96

resources/variants/ultimaker_s3_aa04.inst.cfg

@@ -25,7 +25,6 @@ raft_surface_layers = 2
 retraction_amount = 6.5
 retraction_count_max = 25
 retraction_min_travel = =line_width * 2
-retraction_prime_speed = =retraction_speed
 skin_overlap = 15
 speed_print = 70
 speed_topbottom = =math.ceil(speed_print * 30 / 70)

resources/variants/ultimaker_s5_aa04.inst.cfg

@@ -25,7 +25,6 @@ raft_surface_layers = 2
 retraction_amount = 6.5
 retraction_count_max = 25
 retraction_min_travel = =line_width * 2
-retraction_prime_speed = =retraction_speed
 skin_overlap = 15
 speed_print = 70
 speed_topbottom = =math.ceil(speed_print * 30 / 70)