DOC,MAINT: Move towncrier files and fixup categories

Name all categories as singular (or adjectives). Also move the fragments
into an ``upcoming_changes`` folder to be more discoverable.

Notes that we format some things as bullet points traditionally (right now
towncrier only truly supports bullet point format, but I have a PR to fix
that).

1 files changed, 0 insertions, 50 deletions

diff --git a/changelog/README.rst b/changelog/README.rst
deleted file mode 100644
index 03f020c1e..000000000
--- a/changelog/README.rst
+++ /dev/null
@@ -1,50 +0,0 @@
-:orphan:
-
-Changelog
-=========
-
-This directory contains "news fragments" which are short files that contain a
-small **ReST**-formatted text that will be added to the next what's new page.
-
-Make sure to use full sentences with correct case and punctuation, and please
-try to use Sphinx intersphinx using backticks. The fragment should have a
-header line and an underline using ``------``
-
-Each file should be named like ``<PULL REQUEST>.<TYPE>.rst``, where
-``<PULL REQUEST>`` is a pull request number, and ``<TYPE>`` is one of:
-
-* ``new_function``: New user facing functions.
-* ``deprecation``: Changes existing code to emit a DeprecationWarning.
-* ``future``: Changes existing code to emit a FutureWarning.
-* ``expired``: Removal of a deprecated part of the API.
-* ``compatibility``: A change which requires users to change code and is not
-  backwards compatible. (Not to be used for removal of deprecated features.)
-* ``c_api``: Changes in the Numpy C-API exported functions
-* ``new_features``: New user facing features like ``kwargs``.
-* ``improvements``: Performance and edge-case changes
-* ``changes``: Other changes
-
-So for example: ``123.new_features.rst`` would have the content::
-
-    my_new_feature option for `my_favorite_function`
-    ------------------------------------------------
-    The ``my_new_feature`` option is now available for `my_favorite_function`.
-    To use it, write ``np.my_favorite_function(..., my_new_feature=True)``.
-
-
-Note the use of single-backticks to get an internal link (assuming
-``my_favorite_function`` is exported from the ``numpy`` namespace), and double-
-backticks for code.
-
-If you are unsure what pull request type to use, don't hesitate to ask in your
-PR.
-
-You can install ``towncrier`` and run ``towncrier --draft --version NumPy``
-if you want to get a preview of how your change will look in the final release
-notes.
-
-.. note::
-
-    This README was adapted from the pytest changelog readme under the terms of
-    the MIT licence.
-