remove activity content from git until deployment

macao/.gitignore

macao/content/activities/Partie1/20/index.md

macao/content/activities/Partie1/20/quiz.json

macao/content/activities/Partie1/_index.md

macao/content/activities/Partie2/381/index.md

macao/content/activities/Partie2/381/quiz.json

macao/content/activities/Partie2/861/index.md

macao/content/activities/Partie2/861/quiz.json

macao/content/activities/Partie2/_index.md

macao/content/activities/Partie3/_index.md

macao/content/activities/Partie3/souspartie/938/index.md

macao/content/activities/Partie3/souspartie/_index.md