Remove remaining ununsed Python 3.9 artifacts (#36812) #40330

Job	Run time
Java Wordcount Direct Runner (self-hosted, ubuntu-20.04, main)	5m 10s
Java Wordcount Direct Runner (macos-latest)	5m 8s
Java Unit Tests (self-hosted, ubuntu-20.04, main)	4m 20s
Java Wordcount Direct Runner (windows-latest)	5m 13s
Java Unit Tests (macos-latest)	4m 9s
Java Unit Tests (windows-latest)	4m 47s
	28m 47s

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