recipes: update for PYPI_PACKAGE change

The pypi class has slightly changed the semantics of the PYPI_PACKAGE
variable[1], now PYPI_PACKAGE is the normalised package name and the new
variable PYPI_PACKAGE_SDIST is used when the source tarball doesn't match.

Update recipes as appropriate: this is mostly deleting now-redundant
assignments but some assignments are still needed where packages are not
uploaded using the modern standards.

[1] oe-core 98049bf86b6 ("classes/pypi: change PYPI_PACKAGE to be normalised")

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-python/recipes-devtools/python/python3-legacy-cgi_2.6.4.bb

@@ -3,8 +3,6 @@ HOMEPAGE = "https://github.com/jackrosenthal/legacy-cgi"
 LICENSE = "PSF-2.0"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=4b8801e752a2c70ac41a5f9aa243f766"
 
-PYPI_PACKAGE = "legacy_cgi"
-
 inherit python_poetry_core pypi python_hatchling
 
 SRC_URI += "\