v8: only remove prefix when mapping is removed #205

Job	Run time
Build integration test binaries	1m 52s
Lint (stable)	3m 10s
Test (stable, ubuntu-24.04)	3m 54s
Integration tests (kernel v4.19.314)	42s
Integration tests (kernel v5.4.276)	38s
Integration tests (kernel v5.10.217)	38s
Integration tests (kernel v5.15.159)	50s
Integration tests (kernel v6.1.91)	41s
Integration tests (kernel v6.6.31)	38s
Integration tests (kernel v6.8.10)	40s
Integration tests (kernel v6.9.1)	57s
Build (stable, arm-4core-linux-ubuntu24.04)	4m 1s
Build (stable, ubuntu-24.04)	1m 55s
Publish pre-release	23s
	20m 59s

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