copy-past-error causing 1s too long exposure in sparkmaker script

tools/convert_sparkmaker.py

@@ -150,7 +150,6 @@ def write_wow(f, params, imgs):
         write("}}")
         write("M106 S255;")
         write("G4 S" + str(exposure_time) + ";")
-        write("G4 S1;")
 
     write("M106 S0;")