message: docs(ref): Remove redundant workspace description
diff: ## Workspaces
  -A *workspace* is a collection of one or more packages that share common
  -dependency resolution (with a shared `Cargo.lock`), output directory, and
  -various settings such as profiles. Packages that are part of a workspaces are
  -called *workspace members*.
  +A *workspace* is a collection of one or more packages, called *workspace
  +members*, that are managed together.
  The key points of workspaces are:
  