fix: goimports — strip unused imports from all server files

internal/server/users.go

@@ -1,14 +1,12 @@
 package server
 
 import (
-	"fmt"
 	"net/http"
-	"strings"
-	"time"
+
+	"gophergate/internal/db"
 
 	"github.com/gin-gonic/gin"
 	"golang.org/x/crypto/bcrypt"
-	"gophergate/internal/db"
 )
 
 func (s *Server) handleGetUsers(c *gin.Context) {
@@ -109,4 +107,3 @@ func (s *Server) handleDeleteUser(c *gin.Context) {
 
 	c.JSON(http.StatusOK, SuccessResponse(gin.H{"message": "User deleted"}))
 }
-