Close 8.17 development branch (elastic#133531)

No additional 8.17.x versions are planned.
8.17.11 removed as it was only snapshot and never released.

Author: jozala

branches.json

@@ -13,9 +13,6 @@
     {
       "branch": "8.17"
     },
-    {
-      "branch": "8.17"
-    },
     {
       "branch": "7.17"
     }

server/src/main/java/org/elasticsearch/Version.java

@@ -206,7 +206,6 @@ public class Version implements VersionId<Version>, ToXContentFragment {
     public static final Version V_8_17_8 = new Version(8_17_08_99);
     public static final Version V_8_17_9 = new Version(8_17_09_99);
     public static final Version V_8_17_10 = new Version(8_17_10_99);
-    public static final Version V_8_17_11 = new Version(8_17_11_99);
     public static final Version V_8_18_0 = new Version(8_18_00_99);
     public static final Version V_8_18_1 = new Version(8_18_01_99);
     public static final Version V_8_18_2 = new Version(8_18_02_99);