When you remove a document store, all settings and indexes are permanently removed from the disk. All documents indexed under the removed document store are no longer returned in searches.
Removing a file system document store
From the File System Document Stores page, select the file system document store.
Click Remove.
Click OK to confirm the deletion.
Removing a database document store
From the Database Document Stores page, select the database document store.
Click Remove.
Click OK to confirm the deletion.