python3.8: bulk removal of now obsolete "_python38" packages. (#9328)

* python3.8: bulk removal of now obsolete "_python38" packages.

Done via scripting. No functional change intended or expected.

Some manual tweaks will follow.

* python3.8: further manual tweaks after bulk-3.8-removal.

Unlike the previous commit with automated changes,
I've tested builds for *these* recipes in beta4 64 bits.

dev-python/aiodns/aiodns-2.0.0.recipe

@@ -4,7 +4,7 @@ resolutions with a synchronous looking interface by using pycares"
 HOMEPAGE="https://pypi.python.org/pypi/aiodns"
 COPYRIGHT="2016 Saúl Ibarra Corretgé"
 LICENSE="MIT"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://pypi.org/packages/source/a/aiodns/aiodns-$portVersion.tar.gz"
 CHECKSUM_SHA256="815fdef4607474295d68da46978a54481dd1e7be153c7d60f9e72773cd38d77d"
 
@@ -21,22 +21,25 @@ BUILD_REQUIRES="
 	haiku_devel
 	"
 
-PYTHON_PACKAGES=(python38 python39 python310)
-PYTHON_VERSIONS=(3.8 3.9 3.10)
+PYTHON_PACKAGES=(python39 python310)
+PYTHON_VERSIONS=(3.9 3.10)
 for i in "${!PYTHON_PACKAGES[@]}"; do
-pythonPackage=${PYTHON_PACKAGES[i]}
-pythonVersion=${PYTHON_VERSIONS[$i]}
-eval "PROVIDES_${pythonPackage}=\"\
-	${portName}_$pythonPackage = $portVersion\
-	\"; \
-REQUIRES_$pythonPackage=\"\
-	haiku\n\
-	cmd:python$pythonVersion\
-	\""
-BUILD_REQUIRES="$BUILD_REQUIRES
-	setuptools_$pythonPackage"
-BUILD_PREREQUIRES="$BUILD_PREREQUIRES
-	cmd:python$pythonVersion"
+	pythonPackage=${PYTHON_PACKAGES[i]}
+	pythonVersion=${PYTHON_VERSIONS[$i]}
+
+	eval "PROVIDES_${pythonPackage}=\"
+		${portName}_$pythonPackage = $portVersion
+		\""
+	eval "REQUIRES_$pythonPackage=\"
+		haiku
+		cmd:python$pythonVersion
+		\""
+	BUILD_REQUIRES+="
+		setuptools_$pythonPackage
+		"
+	BUILD_PREREQUIRES+="
+		cmd:python$pythonVersion
+		"
 done
 
 INSTALL()