v8: only remove prefix when mapping is removed #203

Job	Run time
Build integration test binaries	1m 52s
Test (stable, ubuntu-24.04)	3m 42s
Lint (stable)	3m 4s
Integration tests (kernel v4.19.314)	37s
Integration tests (kernel v5.4.276)	58s
Integration tests (kernel v5.10.217)	40s
Integration tests (kernel v5.15.159)	38s
Integration tests (kernel v6.1.91)	41s
Integration tests (kernel v6.6.31)	37s
Integration tests (kernel v6.8.10)	53s
Integration tests (kernel v6.9.1)	37s
Build (stable, arm-4core-linux-ubuntu24.04)	3m 18s
Build (stable, ubuntu-24.04)	2m 0s
Publish pre-release	17s
	19m 54s

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