Drop python 3.7 (and 2.7) for recipes under dev-python/

Recipes with only 3.7 are left alone. Help with #8025.

dev-python/qrcode/qrcode-7.2.recipe

@@ -4,7 +4,7 @@ the generation of QR Codes."
 HOMEPAGE="https://github.com/lincolnloop/python-qrcode/"
 COPYRIGHT="2011 Lincoln Loop"
 LICENSE="BSD (3-clause)"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/lincolnloop/python-qrcode/archive/refs/tags/v$portVersion.tar.gz"
 CHECKSUM_SHA256="051935ae06d8180a5a2413192dd236fdc6a2f3da3ef04af682afbe9d5c3286f4"
 SOURCE_FILENAME="qrcode-v$portVersion.tar.gz"
@@ -27,8 +27,8 @@ BUILD_PREREQUIRES="
 	cmd:gcc$secondaryArchSuffix
 	"
 
-PYTHON_PACKAGES=(python3 python38 python39)
-PYTHON_VERSIONS=(3.7 3.8 3.9)
+PYTHON_PACKAGES=(python38 python39)
+PYTHON_VERSIONS=(3.8 3.9)
 for i in "${!PYTHON_PACKAGES[@]}"; do
 pythonPackage=${PYTHON_PACKAGES[i]}
 pythonVersion=${PYTHON_VERSIONS[$i]}
@@ -47,9 +47,6 @@ BUILD_PREREQUIRES="$BUILD_PREREQUIRES
 	cmd:python$pythonVersion"
 done
 
-PROVIDES_python3="$PROVIDES_python3
-	cmd:qr3.7
-	"
 PROVIDES_python38="$PROVIDES_python38
 	cmd:qr3.8
 	"