fix: delete code keys from converted markdown cells
fix: delete code keys from converted markdown cells

captainsafia/nteract,rgbkrk/nteract,temogen/nteract,nteract/composition,nteract/composition,nteract/nteract,rgbkrk/nteract,rgbkrk/nteract,nteract/nteract,jdetle/nteract,rgbkrk/nteract,jdfreder/nteract,temogen/nteract,0u812/nteract,0u812/nteract,jdetle/nteract,jdetle/nteract,rgbkrk/nteract,captainsafia/nteract,captainsafia/nteract,nteract/nteract,nteract/nteract,temogen/nteract,jdfreder/nteract,nteract/nteract,jdetle/nteract,0u812/nteract,0u812/nteract,captainsafia/nteract,nteract/composition,jdfreder/nteract,jdfreder/nteract