When you disconnect a project from source control, Dimensions does not delete revisions in the repository; it simply removes the association between the project and the repository. You can choose whether to keep or remove the Dimensions CM metadata about the project.
To disconnect a project from source control:
Right-click on a project node, and select Team | Disconnect.
A confirmation dialog appears.
To delete the metadata in addition to disconnecting the project, select "Also delete Dimensions CM metadata from the file system." This will delete the information in the .metadata directories in the workspace project, which Dimensions CM These directories are created when you get files from Dimensions to store information about the workspace files and directories. They are updated as source control operations are performed.
Click Yes to confirm the action.