Bump prompt-toolkit from 1.0.9 to 3.0.17 (#4847)

* Bump prompt-toolkit from 1.0.9 to 3.0.17

Bumps [prompt-toolkit](https://github.com/prompt-toolkit/python-prompt-toolkit) from 1.0.9 to 3.0.17.
- [Release notes](https://github.com/prompt-toolkit/python-prompt-toolkit/releases)
- [Changelog](https://github.com/prompt-toolkit/python-prompt-toolkit/blob/master/CHANGELOG)
- [Commits](https://github.com/prompt-toolkit/python-prompt-toolkit/commits)

Signed-off-by: dependabot[bot] <support@github.com>

* Remove unused dependency

* Remove unused dependencies

* Remove unused dependencies

* Remove unused dependencies

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>

requirements.txt

@@ -1,18 +1,10 @@
 -r requirements_common.txt
 
 Jinja2==2.11.3
-backports.shutil-get-terminal-size==1.0.0
 clint==0.5.1
 decorator==4.4.2
-docopt==0.6.2
-docutils==0.16
 ecdsa==0.16.1
 meld3==2.0.1
-ndg-httpsclient==0.5.1
-pathlib2==2.3.5
-pickleshare==0.7.5
-prompt-toolkit==1.0.9
-py==1.10.0
 pyOpenSSL==20.0.1
 pyasn1==0.4.8
 python-dateutil==2.8.1