v8: only remove prefix when mapping is removed #201

Job	Run time
Lint (stable)	3m 3s
Build integration test binaries	1m 51s
Test (stable, ubuntu-24.04)	3m 53s
Integration tests (kernel v4.19.314)	38s
Integration tests (kernel v5.4.276)	42s
Integration tests (kernel v5.10.217)	41s
Integration tests (kernel v5.15.159)	53s
Integration tests (kernel v6.1.91)	38s
Integration tests (kernel v6.6.31)	58s
Integration tests (kernel v6.8.10)	37s
Integration tests (kernel v6.9.1)	52s
Build (stable, arm-4core-linux-ubuntu24.04)	3m 8s
Build (stable, ubuntu-24.04)	1m 53s
Publish pre-release	0s
	19m 47s

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