cmd/gendb: delete unused matchesCurrent
cmd/gendb: delete unused matchesCurrent

Running staticcheck found that matchesCurrent is unsed, so the function
is deleted.

Staticccheck error:
cmd/gendb/main.go:32:6: func matchesCurrent is unused (U1000)

Change-Id: I36d36e9ceebf09abd70712e824ba0247852491ab
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/356172
Trust: Julie Qiu <8d32267b6b4884cf35adeaccde2b6857ae11aace@golang.org>
Run-TryBot: Julie Qiu <8d32267b6b4884cf35adeaccde2b6857ae11aace@golang.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Roland Shoemaker <0d270388f2f92757a5de0f4bd891d3b392c44c4f@golang.org>

golang/vuln,golang/vuln