Add saml private key to gitignore, remove unused constants (#27391)

server/.gitignore

@@ -12,6 +12,7 @@ mattermost.mattermost-license
 config/mattermost.mattermost-license
 config/config.json
 config/*.crt
+config/*.key
 
 web/static/js/bundle*.js
 web/static/js/bundle*.js.map

server/channels/app/license.go

@@ -5,7 +5,6 @@ package app
 
 import (
 	"net/http"
-	"time"
 
 	"github.com/golang-jwt/jwt/v5"
 	"github.com/pkg/errors"
@@ -14,10 +13,6 @@ import (
 	"github.com/mattermost/mattermost/server/v8/channels/store"
 )
 
-const (
-	JWTDefaultTokenExpiration = 7 * 24 * time.Hour // 7 days of expiration
-)
-
 func (ch *Channels) License() *model.License {
 	return ch.srv.License()
 }

server/channels/app/platform/license.go

@@ -9,7 +9,6 @@ import (
 	"fmt"
 	"net/http"
 	"os"
-	"time"
 
 	"github.com/golang-jwt/jwt/v5"
 	"github.com/pkg/errors"
@@ -24,8 +23,7 @@ import (
 )
 
 const (
-	LicenseEnv                = "MM_LICENSE"
-	JWTDefaultTokenExpiration = 7 * 24 * time.Hour // 7 days of expiration
+	LicenseEnv = "MM_LICENSE"
 )
 
 // JWTClaims custom JWT claims with the needed information for the