Refactor steamcache.go to simplify code and improve readability

- Removed the min function and the verifyResponseHash function to streamline the codebase.
- Updated extractHashFromSteamPath to use strings.TrimPrefix for cleaner path handling.
- Retained comments regarding removed Prometheus metrics for future reference.

steamcache/steamcache.go

@@ -28,24 +28,10 @@ import (
 	"github.com/docker/go-units"
 )
 
-// min returns the minimum of two integers
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
-// Removed Prometheus metrics - keeping this comment for reference:
-// requestsTotal, cacheStatusTotal, responseTime, hashVerificationTotal
-
 // extractHashFromSteamPath extracts a hash from Steam depot URLs
 // Handles patterns like: /depot/123/chunk/abcdef... or /depot/123/manifest/456/789/hash
 func extractHashFromSteamPath(path string) (string, bool) {
-	// Remove leading slash
-	if strings.HasPrefix(path, "/") {
-		path = path[1:]
-	}
+	path = strings.TrimPrefix(path, "/")
 
 	parts := strings.Split(path, "/")
 	if len(parts) < 3 {
@@ -136,12 +122,6 @@ func verifyFileHash(data []byte, expectedHash string) bool {
 	return strings.EqualFold(actualHash, expectedHash)
 }
 
-// verifyResponseHash verifies that the full HTTP response matches the expected hash
-func verifyResponseHash(resp *http.Response, bodyData []byte, expectedHash string) bool {
-	actualHash := calculateResponseHash(resp, bodyData)
-	return strings.EqualFold(actualHash, expectedHash)
-}
-
 var hopByHopHeaders = map[string]struct{}{
 	"Connection":          {},
 	"Keep-Alive":          {},