Remove upload work from PyPI API revamp task

Per pypi/warehouse#7730 ,
overhauling Warehouse's upload API requires a new
PEP. The fundable improvement guidelines say we
shouldn't ask for money for something till we have
consensus for the idea, meaning that any PEPs are
finished and approved. Thus, this commit removes
the upload work from the list of features in the
PyPI API revamp task.

Signed-off-by: Sumana Harihareswara <sh@changeset.nyc>

FUNDABLES.md

@@ -65,32 +65,20 @@ downstream projects that depend on them.
 
 ### Revamp PyPI API
 
-The [Python Package Index](https://pypi.org/), a key platform for Python developers,
-has [a minimal API](https://warehouse.readthedocs.io/api-reference/) that does not implement
-[many features that users have
-requested](https://github.com/pypa/warehouse/labels/APIs%2Ffeeds). The lack of
-a full-featured API in Warehouse (the PyPI codebase) blocks many improvements,
-including:
+The [Python Package Index](https://pypi.org/), a key platform for Python developers, has a browser interface, but most people use PyPI by hitting its [API endpoints](https://warehouse.readthedocs.io/api-reference/#available-apis) with client applications such as `pip`. PyPI has [a minimal download API](https://warehouse.readthedocs.io/api-reference/) that does not implement [many features that users have requested](https://github.com/pypa/warehouse/labels/APIs%2Ffeeds). The lack of a full-featured download API in Warehouse (the PyPI codebase) blocks many improvements, including:
 
 -   [Light-bandwidth metadata-only API
     calls](https://github.com/pypa/warehouse/issues/474) and [JSON
     standardization](https://github.com/pypa/pip/issues/7406#issuecomment-583891169)
     that would enable better downloads, installations, dependency resolution
     features, and troubleshooting for `pip` and other clients
--   [Asynchronous
-    uploads](https://github.com/pypa/warehouse/issues/7730) and thus
-    [some validation checks](https://github.com/pypa/warehouse/issues/5420) and
-    [license compliance checking](https://discuss.python.org/t/improving-license-clarity-with-better-package-metadata/2154/71)
 -   [RSS feeds](https://github.com/pypa/warehouse/pull/7013) that
     other platforms could reuse to get PyPI updates in user tooling
--   [Release security features (via token
-    generation)](https://github.com/pypa/warehouse/issues/6378)
 -   [Security notification feeds](https://github.com/pypa/warehouse/issues/798)
 -   [Caching for the bandersnatch mirroring
     client](https://github.com/pypa/warehouse/issues/284)
 
-This requires backend development work, technical writing, user experience
-research, and publicity and coordination work within Python's community.
+We'd like to [architect and implement a new Warehouse download API](https://github.com/pypa/warehouse/issues/284) to support these features, and deprecate and decommission the old endpoints. This requires backend development work, technical writing, user experience research, and publicity and coordination work within Python's community.
 
 ### Make setuptools the reference implementation of the distutils API