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-flask-xstatic_0.0.1.bb

@@ -6,7 +6,7 @@ SRC_URI[sha256sum] = "226ea8e97065a9488b59bfe5c94af4c6e2ea70a25052e301fb231a1381
 
 SRC_URI += "file://remove-pip-requires.patch"
 
-PYPI_PACKAGE = "Flask-XStatic"
+PYPI_PACKAGE_SDIST = "Flask-XStatic"
 
 RDEPENDS:${PN} += "\
     python3-flask \