[experiments] Remove share-database option

This is now done at the Database declaration level.

Fixes #79
4 jobs for 79_remove_explicit_datasharing_option in 8 minutes and 10 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #218122
docker-build
build_linux_36

00:02:44

58.0%
passed #218123
docker-build
build_linux_37

00:02:37

58.0%
passed #218120
macosx
build_macosx_36

00:08:09

58.0%
passed #218121
macosx
build_macosx_37

00:07:56

58.0%