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-zeroconf_0.131.0.bb

@@ -8,7 +8,7 @@ SRC_URI[sha256sum] = "90c431e99192a044a5e0217afd7ca0ca9824af93190332e6f7baf4da53
 inherit pypi setuptools3
 
 RDEPENDS:${PN} += " \
-    ${PYTHON_PN}-ifaddr \
-    ${PYTHON_PN}-asyncio \
-    ${PYTHON_PN}-async-timeout \
+    python3-ifaddr \
+    python3-asyncio \
+    python3-async-timeout \
 "