fix redundency error

Signed-off-by: xinyual <xinyual@amazon.com>

Author: xinyual

core/src/main/java/org/opensearch/sql/expression/function/BuiltinFunctionName.java

@@ -229,9 +229,6 @@ public enum BuiltinFunctionName {
   TRIM(FunctionName.of("trim")),
   UPPER(FunctionName.of("upper")),
 
-  /** Array Functions. */
-  ARRAY(FunctionName.of("array")),
-
   /** Json Functions. */
   JSON_VALID(FunctionName.of("json_valid")),
   JSON(FunctionName.of("json")),