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-arpeggio_2.0.2.bb

@@ -10,8 +10,8 @@ inherit pypi setuptools3
 
 # setup.py of Arpeggio needs this.
 DEPENDS += "\
-    ${PYTHON_PN}-pytest-runner-native \
-    ${PYTHON_PN}-wheel-native \
+    python3-pytest-runner-native \
+    python3-wheel-native \
 "
 
 BBCLASSEXTEND = "native nativesdk"