docs: Remove academics files

Those generated files are not explicitly under Apache-2.0 licence
and AFAIK they can not be regenerated from missing (latex?) sources.

To avoid licence mixup.
It would help to have those files published elsewhere.
Meanwhile online (Github) links are used.

Debian had to repack the source package to make tarball compliant with DFSG
dispite debian tools are known to be trustworthy,
this extra step would add weakess in the chain of trust

Cleanup done upstream would make distribution safer.

Bug: #1161
Bug-Debian: https://salsa.debian.org/python-team/packages/tuf/-/merge_requests/11
Relate-to: #263 (comment)
Signed-off-by: Philippe Coval <[email protected]>

Author: rzr

MANIFEST.in

@@ -12,7 +12,6 @@ include tests/ssl_certs/*.key
 recursive-include docs *.txt
 recursive-include docs *.md
 recursive-include docs *.rst
-recursive-include docs/papers *.pdf
 recursive-include docs/images *.png
 recursive-include tuf/scripts *.py
 recursive-include examples *

docs/OVERVIEW.rst

@@ -85,19 +85,19 @@ updater systems, TUF's design and implementation details, attacks on
 package managers, and package management security:
 
 -  `Mercury: Bandwidth-Effective Prevention of Rollback Attacks Against Community Repositories
-   <papers/prevention-rollback-attacks-atc2017.pdf?raw=true>`_
+   <https://github.com/theupdateframework/tuf/raw/v0.17.0/docs/papers/attacks-on-package-managers-ccs2008.pdf?raw=true>
 
 -  `Diplomat: Using Delegations to Protect Community Repositories
-   <papers/protect-community-repositories-nsdi2016.pdf?raw=true>`_
+   <https://github.com/theupdateframework/tuf/raw/v0.17.0/docs/papers/protect-community-repositories-nsdi2016.pdf?raw=true>`
 
 -  `Survivable Key Compromise in Software Update
-   Systems <papers/survivable-key-compromise-ccs2010.pdf?raw=true>`_
+   Systems <https://github.com/theupdateframework/tuf/raw/v0.17.0/docs/papers/survivable-key-compromise-ccs2010.pdf?raw=true>`
 
 -  `A Look In the Mirror: Attacks on Package
-   Managers <papers/package-management-security-tr08-02.pdf?raw=true>`_
+   Managers <https://github.com/theupdateframework/tuf/raw/v0.17.0/docs/papers/package-management-security-tr08-02.pdf?raw=true>`
 
 -  `Package Management
-   Security <papers/attacks-on-package-managers-ccs2008.pdf?raw=true>`_
+   Security <https://github.com/theupdateframework/tuf/raw/v0.17.0/docs/papers/attacks-on-package-managers-ccs2008.pdf?raw=true>`
 
 What TUF Does
 -------------