[lecture_comparison][16_Kasten_Processes]redundant_output

[sayaikegawa]

This is a minor issue that the output inMyST is redundant like below. (left: RST right: MyST)

cc: @mmcky

[mmcky]

thanks @sayaikegawa -- this might be less of an issue once quantecon-book-theme=0.1.2 which fixes the background colors. Let's review once that new release is out. (cc: @AakashGfude)