Remove support for legacy dependencies

Author: jpadilla

.travis.yml

@@ -4,11 +4,11 @@ matrix:
     - python: 3.8
       env: TOXENV=lint,typing
     - python: 3.5
-      env: TOXENV=py35-crypto,py35-nocrypto,py35-contrib_crypto
+      env: TOXENV=py35-crypto,py35-nocrypto
     - python: 3.6
-      env: TOXENV=py36-crypto,py36-nocrypto,py36-contrib_crypto
+      env: TOXENV=py36-crypto,py36-nocrypto
     - python: 3.7
-      env: TOXENV=py37-crypto,py37-nocrypto,py37-contrib_crypto
+      env: TOXENV=py37-crypto,py37-nocrypto
     - python: 3.8
       env: TOXENV=py38-crypto,py38-nocrypto
 install:

docs/installation.rst

@@ -23,39 +23,4 @@ The ``pyjwt[crypto]`` format is recommended in requirements files in
 projects using ``PyJWT``, as a separate ``cryptography`` requirement line
 may later be mistaken for an unused requirement and removed.
 
-.. _legacy-deps:
-
-Legacy Dependencies
--------------------
-
-Some environments, most notably Google App Engine, do not allow the installation
-of Python packages that require compilation of C extensions and therefore
-cannot install ``cryptography``. If you can install ``cryptography``, you
-should disregard this section.
-
-If you are deploying an application to one of these environments, you may
-need to use the legacy implementations of the  digital signature algorithms:
-
-.. code-block:: console
-
-    $ pip install pycrypto ecdsa
-
-Once you have installed ``pycrypto`` and ``ecdcsa``, you can tell PyJWT to use
-the legacy implementations with ``jwt.register_algorithm()``. The following
-example code shows how to configure PyJWT to use the legacy implementations
-for RSA with SHA256 and EC with SHA256 signatures.
-
-.. code-block:: python
-
-    import jwt
-    from jwt.contrib.algorithms.pycrypto import RSAAlgorithm
-    from jwt.contrib.algorithms.py_ecdsa import ECAlgorithm
-
-    jwt.unregister_algorithm('RS256')
-    jwt.unregister_algorithm('ES256')
-
-    jwt.register_algorithm('RS256', RSAAlgorithm(RSAAlgorithm.SHA256))
-    jwt.register_algorithm('ES256', ECAlgorithm(ECAlgorithm.SHA256))
-
-
 .. _`cryptography`: https://cryptography.io