pkg/vminfo: remove Context from the constructor #15245

Job	Run time
build	4m 43s
aux	3m 37s
dashboard	2m 13s
arch (presubmit_arch_linux)	9m 23s
gvisor	3m 3s
arch (presubmit_arch_freebsd)	5m 32s
old	6m 0s
arch (presubmit_arch_netbsd)	3m 23s
race	9m 13s
arch (presubmit_arch_openbsd)	3m 16s
race_dashboard	3m 52s
arch (presubmit_arch_darwin)	3m 25s
arch (presubmit_arch_windows)	3m 9s
arch (presubmit_arch_executor)	2m 55s
	1h 3m 44s

Provide feedback