inital pass at replacing ":" with "-" in image on-disk names

server/images.go

@@ -795,10 +795,8 @@ func PruneLayers() error {
 
 	for _, blob := range blobs {
 		name := blob.Name()
-		if runtime.GOOS == "windows" {
 		name = strings.ReplaceAll(name, "-", ":")
-		}
-		if strings.HasPrefix(name, "sha256:") {
+		if strings.HasPrefix(name, "sha256-") {
 			deleteMap[name] = struct{}{}
 		}
 	}

server/layers.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"io"
 	"os"
-	"runtime"
 	"strings"
 
 	"golang.org/x/exp/slices"
@@ -47,10 +46,7 @@ func NewLayer(r io.Reader, mediatype string) (*Layer, error) {
 		return nil, err
 	}
 
-	delimiter := ":"
-	if runtime.GOOS == "windows" {
-		delimiter = "-"
-	}
+	const delimiter = "-"
 
 	pattern := strings.Join([]string{"sha256", "*-partial"}, delimiter)
 	temp, err := os.CreateTemp(blobs, pattern)

server/modelpath.go

@@ -6,7 +6,6 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
-	"runtime"
 	"strings"
 )
 
@@ -150,10 +149,7 @@ func GetBlobsPath(digest string) (string, error) {
 		return "", err
 	}
 
-	if runtime.GOOS == "windows" {
 	digest = strings.ReplaceAll(digest, ":", "-")
-	}
-
 	path := filepath.Join(dir, "blobs", digest)
 	dirPath := filepath.Dir(path)
 	if digest == "" {