Remove LANG-1291 from changes.xml since it has been reverted

Author: britter

src/changes/changes.xml

@@ -73,7 +73,6 @@ The <action> type attribute can be add,update,fix,remove.
     <action issue="LANG-1258" type="add" dev="pschumacher" due-to="IG, Grzegorz Rożniecki">Add ArrayUtils#toStringArray method</action>
     <action issue="LANG-1160" type="add" dev="kinow">StringUtils#abbreviate should support 'custom ellipses' parameter</action>
     <action issue="LANG-1293" type="add" dev="pschumacher" due-to="Pierre Templier, Martin Tarjanyi">Add StringUtils#isAllEmpty and #isAllBlank methods</action>
-    <action issue="LANG-1291" type="add" dev="ggregory">Provide annotations to document thread safety</action>
     <action issue="LANG-1290" type="update" dev="pschumacher" due-to="Andrii Abramov">Increase test coverage of org.apache.commons.lang3.ArrayUtils</action>
     <action issue="LANG-1274" type="update" dev="pschumacher">StrSubstitutor should state its thread safety</action>
     <action issue="LANG-1277" type="update" dev="pschumacher" due-to="yufcuy">StringUtils#getLevenshteinDistance reduce memory consumption</action>