refactor: remove dead code

backend/internal/utils/http_util.go

@@ -1,48 +1,12 @@
 package utils
 
 import (
-	"net/http"
-	"net/url"
 	"strconv"
-	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
 )
 
-// BearerAuth returns the value of the bearer token in the Authorization header if present
-func BearerAuth(r *http.Request) (string, bool) {
-	const prefix = "bearer "
-
-	authHeader := r.Header.Get("Authorization")
-	if len(authHeader) >= len(prefix) && strings.ToLower(authHeader[:len(prefix)]) == prefix {
-		return authHeader[len(prefix):], true
-	}
-
-	return "", false
-}
-
-// OAuthClientBasicAuth returns the OAuth client ID and secret provided in the request's
-// Authorization header, if present. See RFC 6749, Section 2.3.
-func OAuthClientBasicAuth(r *http.Request) (clientID, clientSecret string, ok bool) {
-	clientID, clientSecret, ok = r.BasicAuth()
-	if !ok {
-		return "", "", false
-	}
-
-	clientID, err := url.QueryUnescape(clientID)
-	if err != nil {
-		return "", "", false
-	}
-
-	clientSecret, err = url.QueryUnescape(clientSecret)
-	if err != nil {
-		return "", "", false
-	}
-
-	return clientID, clientSecret, true
-}
-
 // SetCacheControlHeader sets the Cache-Control header for the response.
 func SetCacheControlHeader(ctx *gin.Context, maxAge, staleWhileRevalidate time.Duration) {
 	_, ok := ctx.GetQuery("skipCache")