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-multimedia/recipes-devtools/python/python3-pillow-heif_1.8.0.bb

@@ -6,8 +6,6 @@ LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=b6c07a92aed67c33bc346748d7c7e991"
 # While this item does not require it, it depends on libheif which does
 LICENSE_FLAGS = "commercial"
 
-PYPI_PACKAGE = "pillow_heif"
-
 inherit pypi python_setuptools_build_meta
 
 SRC_URI += "file://0001-setup.py-support-cross-compiling.patch"