v8: only remove prefix when mapping is removed #202

Job	Run time
Build integration test binaries	1m 58s
Test (stable, ubuntu-24.04)	3m 42s
Lint (stable)	3m 5s
Integration tests (kernel v4.19.314)	2m 19s
Integration tests (kernel v5.4.276)	52s
Integration tests (kernel v5.10.217)	41s
Integration tests (kernel v5.15.159)	39s
Integration tests (kernel v6.1.91)	42s
Integration tests (kernel v6.6.31)	52s
Integration tests (kernel v6.8.10)	53s
Integration tests (kernel v6.9.1)	38s
Build (stable, arm-4core-linux-ubuntu24.04)	3m 7s
Build (stable, ubuntu-24.04)	1m 57s
Publish pre-release	18s
	21m 43s

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