Remove unused file in pkg/module and clean up dependencies (#625)

* pkg/module: Remove unused file parser.go

PR #618 removed the last remaining user of the functions/types defined
in parser.go

* go.mod: update

The last user of github.com/sabhiram/go-gitignore was removed. Run 'go
mod tidy' to remove the dependency.

* vendor: remove unused dependency

The last user of github.com/sabhiram/go-gitignore was removed. Remove
the vendored copy as well by running 'go mod vendor'.

pkg/module/parser.go

@@ -1,40 +0,0 @@
-package module
-
-import (
-	"strings"
-
-	ignore "github.com/sabhiram/go-gitignore"
-)
-
-type multiIgnoreParser struct {
-	parsers []ignore.IgnoreParser
-}
-
-// Returns map of patterns for more performant searches
-func newMultiIgnoreParser(parsers ...ignore.IgnoreParser) ignore.IgnoreParser {
-	parser := multiIgnoreParser{}
-
-	for _, p := range parsers {
-		if p != nil {
-			parser.parsers = append(parser.parsers, p)
-		}
-	}
-
-	return parser
-}
-
-func (p multiIgnoreParser) MatchesPath(f string) bool {
-	for _, parser := range p.parsers {
-		if parser.MatchesPath(f) {
-			return true
-		}
-	}
-
-	return false
-}
-
-type dsStoreIgnoreParser struct{}
-
-func (p dsStoreIgnoreParser) MatchesPath(f string) bool {
-	return strings.Contains(f, "/.DS_Store")
-}