docs: remove external local outputs scenario

Per iterative/dvc#3929

content/docs/user-guide/managing-external-data.md

@@ -19,7 +19,6 @@ DVC project. DVC will track changes in them and reflect this in the output of
 Currently, the following types (protocols) of external outputs (and
 <abbr>cache</abbr>) are supported:
 
-- Local files and directories outside of your <abbr>workspace</abbr>
 - SSH
 - Amazon S3
 - Google Cloud Storage
@@ -42,22 +41,6 @@ in the same external/remote file system first.
 
 ## Examples
 
-For the examples, let's take a look at a [stage](/doc/command-reference/run)
-that simply moves local file to an external location, producing a `data.txt.dvc`
-DVC-file.
-
-### Local file system path
-
-The default local cache location is `.dvc/cache`, so there is no need to specify
-it explicitly.
-
-```dvc
-$ dvc add /home/shared/mydata
-$ dvc run -d data.txt \
-          -o /home/shared/data.txt \
-          cp data.txt /home/shared/data.txt
-```
-
 ### SSH
 
 ```dvc