Remove obsolete git repository links (#35)

packages/app-shell/README.md

packages/auth/README.md

packages/check-in-place-select/README.md

packages/common/README.md

packages/data-table-view/README.md

packages/file-handling/README.md

packages/knowledge-base-web-page-element-view/README.md

packages/language-select/README.md

packages/matomo/README.md

packages/notification/README.md

packages/person-profile/README.md

packages/person-select/README.md

packages/qr-code-scanner/README.md