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-lorem_0.1.1.bb

@@ -19,8 +19,8 @@ RDEPENDS:${PN} += " \
         python3 \
 "
 RDEPENDS:${PN}-ptest += " \
-        ${PYTHON_PN}-pytest \
-        ${PYTHON_PN}-unittest-automake-output \
+        python3-pytest \
+        python3-unittest-automake-output \
 "
 
 do_install_ptest() {