Remove outdated paragraph about package_revision_mode (#2262)
Remove outdated paragraph about package_revision_mode (#2262)

Building dependencies with package_revision_mode was implemented in https://github.com/conan-io/conan/pull/4958.

Co-authored-by: James <474ba67bdb289c6263b36dfd8a7bed6c85b04943@conan.io>
conan-io/docs,conan-io/docs,conan-io/docs,conan-io/docs