Remove stored annotation from CHANGE_ID_FIELD

Annotation was incorrectly added in change 352957
The field does not need to be stored.

Change-Id: I0a247f96cf5a169ff514d0c9389a5b55d9c00594
Release-Notes:skip

java/com/google/gerrit/server/index/change/ChangeField.java

diff --git a/java/com/google/gerrit/server/index/change/ChangeField.java b/java/com/google/gerrit/server/index/change/ChangeField.java
index 1c0b368..254a7e5 100644
--- a/java/com/google/gerrit/server/index/change/ChangeField.java
+++ b/java/com/google/gerrit/server/index/change/ChangeField.java
@@ -136,7 +136,6 @@
   /** Newer style Change-Id key. */
   public static final IndexedField<ChangeData, String> CHANGE_ID_FIELD =
       IndexedField.<ChangeData>stringBuilder("ChangeId")
-          .stored()
           .required()
           // The new style key is in form Isha1
           .size(41)