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/watchdog/watchdog-0.9.0.recipe

@@ -4,7 +4,7 @@ HOMEPAGE="https://pypi.python.org/pypi/watchdog"
 COPYRIGHT="2011 Yesudeep Mangalapilly
 	2012 Google, Inc."
 LICENSE="Apache v2"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://pypi.python.org/packages/source/w/watchdog/watchdog-$portVersion.tar.gz"
 CHECKSUM_SHA256="965f658d0732de3188211932aeb0bb457587f04f63ab4c1e33eab878e9de961d"
 
@@ -24,8 +24,8 @@ BUILD_PREREQUIRES="
 	cmd:gcc
 	"
 
-PYTHON_PACKAGES=(python python3 python38 python39)
-PYTHON_VERSIONS=(2.7 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]}
@@ -45,17 +45,11 @@ BUILD_PREREQUIRES="$BUILD_PREREQUIRES
 	cmd:python$pythonVersion"
 done
 
-PROVIDES_python="$PROVIDES_python
-	cmd:watchmedo = $portVersion
-	"
-PROVIDES_python3="$PROVIDES_python3
-	cmd:watchmedo3.7 = $portVersion
-	"
 PROVIDES_python38="$PROVIDES_python38
 	cmd:watchmedo3.8 = $portVersion
 	"
 PROVIDES_python39="$PROVIDES_python39
-	cmd:watchmedo3.9 = $portVersion
+	cmd:watchmedo = $portVersion
 	"
 INSTALL()
 {
@@ -73,7 +67,7 @@ INSTALL()
 		$python setup.py build install \
 			--root=/ --prefix=$prefix
 
-		if [ $pythonPackage != python ]; then
+		if [ $pythonPackage != python39 ]; then
 			mv $binDir/watchmedo $binDir/watchmedo$pythonVersion
 		fi
 		packageEntries  $pythonPackage \