meta-python: drop ${PYTHON_PN}

python 2 is long unsupported, so we no longer need this variable.

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-charset-normalizer_3.3.2.bb

@@ -8,8 +8,8 @@ SRC_URI[sha256sum] = "f30c3cb33b24454a82faecaf01b19c18562b1e89558fb6c56de4d9118a
 inherit pypi setuptools3
 
 RDEPENDS:${PN} += " \
-	${PYTHON_PN}-core \
-	${PYTHON_PN}-logging \
-	${PYTHON_PN}-codecs \
-	${PYTHON_PN}-json \
+	python3-core \
+	python3-logging \
+	python3-codecs \
+	python3-json \
 "