Fixed dead wiki links (#950)

* Fixed dead wiki links

* Fixed dead wiki links

* Deleted old documentation at doc/sandbox.

Author: HangenYuu

doc/introduction.rst

@@ -157,9 +157,9 @@ to extend PyTensor, please feel free to ask.
    install
    tutorial/index
 
-.. _LISA:  https://mila.umontreal.ca/
+.. _LISA:  https://mila.quebec/en
 .. _Greek mathematician: http://en.wikipedia.org/wiki/Theano_(mathematician)
-.. _numpy: http://numpy.scipy.org/
+.. _numpy: https://numpy.org/
 .. _BLAS: http://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms
 
 .. _sympy: http://www.sympy.org/

doc/links.rst

@@ -39,18 +39,18 @@ This is a sort of memo for developers and would-be developers.
 
 .. _git: http://git-scm.com/
 .. _pytest: http://docs.pytest.org/en/latest/
-.. _numpy: http://numpy.scipy.org/
+.. _numpy: https://numpy.org/
 .. _python: http://www.python.org
 .. _scipy: http://scipy.org/
 
 .. _autodiff: http://www.autodiff.org
-.. _boost.python: http://www.boost.org/doc/libs/1_38_0/libs/python/doc/index.html
+.. _boost.python: https://www.boost.org/doc/libs/1_85_0/libs/python/doc/html/index.html
 .. _cython: http://www.cython.org/
 .. _liboil: http://liboil.freedesktop.org/wiki/
 .. _llvm: http://llvm.org/
-.. _networkx: http://networkx.lanl.gov/
-.. _pypy: http://codespeak.net/pypy/dist/pypy/doc/
+.. _networkx: https://networkx.org/
+.. _pypy: https://doc.pypy.org/en/latest/
 .. _swig: http://www.swig.org/
-.. _unpython: http://code.google.com/p/unpython/
-.. _pycppad: http://www.seanet.com/~bradbell/pycppad/index.xml
-.. _shedskin: http://shed-skin.blogspot.com/
+.. _unpython: https://code.google.com/archive/p/unpython/
+.. _pycppad: https://github.com/Simple-Robotics/pycppad
+.. _shedskin: https://shedskin.github.io/shedskin/