Addressed #159

Cleaned up all interesting static checks. All that is left is cosmetics.

Signed-off-by: quobix <dave@quobix.com>

index/extract_refs.go

@@ -9,7 +9,6 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
-	"regexp"
 	"strings"
 
 	"github.com/pb33f/libopenapi/utils"
@@ -17,8 +16,6 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-var windowsDriveDetector = regexp.MustCompile(`^([a-zA-Z]:)`)
-
 // ExtractRefs will return a deduplicated slice of references for every unique ref found in the document.
 // The total number of refs, will generally be much higher, you can extract those from GetRawReferenceCount()
 func (index *SpecIndex) ExtractRefs(node, parent *yaml.Node, seenPath []string, level int, poly bool, pName string) []*Reference {
@@ -108,7 +105,7 @@ func (index *SpecIndex) ExtractRefs(node, parent *yaml.Node, seenPath []string,
 							skip = true
 							break
 						}
-						// look for any extension in the path that begins with 'x-'
+						// look for any extension in the path and ignore it
 						if strings.HasPrefix(p, "x-") {
 							skip = true
 							break
@@ -638,9 +635,8 @@ func (index *SpecIndex) ExtractComponentsFromRefs(refs []*Reference) []*Referenc
 	}
 
 	var refsToCheck []*Reference
-	for _, ref := range refs {
-		refsToCheck = append(refsToCheck, ref)
-	}
+	refsToCheck = append(refsToCheck, refs...)
+
 	mappedRefsInSequence := make([]*ReferenceMapped, len(refsToCheck))
 
 	for r := range refsToCheck {