Remove old purls.txt file #13

Job	Run time
Run test and build (ubuntu-24.04-arm)	33s
Run test and build (macos-14)	41s
Run test and build (macos-15)	1m 30s
Run test and build (macos-15-intel)	1m 19s
Run test and build (ubuntu-latest)	33s
	4m 36s

Provide feedback