pbr, gitpython, gerrit: migrate to Python 3.9 and 3.10

Remove the older Python versions from the recipes.

dev-python/gitpython/gitpython-3.1.27.recipe

@@ -21,8 +21,8 @@ BUILD_REQUIRES="
 	haiku_devel
 	"
 
-PYTHON_PACKAGES=(python3)
-PYTHON_VERSIONS=(3.7)
+PYTHON_PACKAGES=(python39 python310)
+PYTHON_VERSIONS=(3.9 3.10)
 for i in "${!PYTHON_PACKAGES[@]}"; do
 pythonPackage=${PYTHON_PACKAGES[i]}
 pythonVersion=${PYTHON_VERSIONS[$i]}

dev-python/pbr/pbr-5.5.1.recipe

@@ -27,8 +27,8 @@ BUILD_REQUIRES="
 	haiku_devel
 	"
 
-PYTHON_PACKAGES=(python python3 python38 python39)
-PYTHON_VERSIONS=(2.7 3.7 3.8 3.9)
+PYTHON_PACKAGES=(python39 python310)
+PYTHON_VERSIONS=(3.9 3.10)
 for i in "${!PYTHON_PACKAGES[@]}"; do
 	pythonPackage=${PYTHON_PACKAGES[i]}
 	pythonVersion=${PYTHON_VERSIONS[$i]}
@@ -44,17 +44,11 @@ BUILD_REQUIRES="$BUILD_REQUIRES
 BUILD_PREREQUIRES="$BUILD_PREREQUIRES
 	cmd:python$pythonVersion"
 done
-PROVIDES_python+="
-	cmd:pbr2
-	"
-PROVIDES_python3+="
+PROVIDES_python39+="
 	cmd:pbr
 	"
-PROVIDES_python38+="
-	cmd:pbr38
-	"
-PROVIDES_python39+="
-	cmd:pbr39
+PROVIDES_python310+="
+	cmd:pbr310
 	"
 
 BUILD()
@@ -87,14 +81,8 @@ INSTALL()
 		$python setup.py install \
 			--root=/ --prefix="$prefix"
 
-		if [ "$pythonPackage" = python ]; then
-			mv "$binDir"/pbr "$binDir"/pbr2
-		fi
-		if [ "$pythonPackage" = python38 ]; then
-			mv "$binDir"/pbr "$binDir"/pbr38
-		fi
-		if [ "$pythonPackage" = python39 ]; then
-			mv "$binDir"/pbr "$binDir"/pbr39
+		if [ "$pythonPackage" = python310 ]; then
+			mv "$binDir"/pbr "$binDir"/pbr310
 		fi
 
 		packageEntries $pythonPackage \