Clearing json files

...es/lec-19/.ipynb_checkpoints/demo_lec_19-checkpoint.ipynb

.../.ipynb_checkpoints/demo_lec_19_template-checkpoint.ipynb

...es/lec-19/.ipynb_checkpoints/lec_19_json-checkpoint.ipynb

.../.ipynb_checkpoints/lec_19_json_template-checkpoint.ipynb

f22/meena_lec_notes/lec-19/cs220_survey_data.json

f22/meena_lec_notes/lec-19/lecture_cs220_data.json

f22/meena_lec_notes/lec-19/major_cs220_data.json

f22/meena_lec_notes/lec-19/numsA.json

f22/meena_lec_notes/lec-19/score_history.json

f22/meena_lec_notes/lec-19/section_cs220_data.json