Makes Anycubic i3 Mega use fan speed from material.

Sets max speed to 100% for small layers as the stock fan is not very strong.

resources/quality/anycubic_i3_mega/anycubic_i3_mega_draft.inst.cfg

@@ -17,8 +17,7 @@ acceleration_travel = 3000
 adhesion_type = skirt
 brim_width = 4.0
 cool_fan_full_at_height = 0.5
-cool_fan_speed = 100
-cool_fan_speed_0 = 100
+cool_fan_speed_max = 100
 infill_overlap = 15
 infill_pattern = zigzag
 infill_sparse_density = 25

resources/quality/anycubic_i3_mega/anycubic_i3_mega_high.inst.cfg

@@ -17,8 +17,7 @@ acceleration_travel = 3000
 adhesion_type = skirt
 brim_width = 4.0
 cool_fan_full_at_height = 0.5
-cool_fan_speed = 100
-cool_fan_speed_0 = 100
+cool_fan_speed_max = 100
 infill_overlap = 15
 infill_pattern = zigzag
 infill_sparse_density = 25

resources/quality/anycubic_i3_mega/anycubic_i3_mega_normal.inst.cfg

@@ -17,8 +17,7 @@ acceleration_travel = 3000
 adhesion_type = skirt
 brim_width = 4.0
 cool_fan_full_at_height = 0.5
-cool_fan_speed = 100
-cool_fan_speed_0 = 100
+cool_fan_speed_max = 100
 infill_overlap = 15
 infill_pattern = zigzag
 infill_sparse_density = 25