btf: remove useless pointer from `newLineInfo` #236

Job	Run time
Build Documentation	19s
Build and Lint	2m 0s
Run tests on previous stable Go	6m 21s
Run tests on pre-built kernel (6.6)	3m 9s
Run tests on pre-built kernel (6.1)	2m 3s
Run tests on pre-built kernel (5.15)	2m 29s
Run tests on pre-built kernel (5.10)	2m 25s
Run tests on pre-built kernel (5.4)	2m 2s
Run tests on pre-built kernel (4.19)	1m 37s
Run tests on pre-built kernel (4.14)	2m 13s
Run tests on pre-built kernel (4.9)	2m 21s
	26m 59s

Provide feedback