Remove SUN_NIO_CH_EXPORT reference from JAVA_11_OPTIONS

- Fix compilation error after merging GEODE-10520 changes
- SUN_NIO_CH_EXPORT constant was removed but still referenced in list

Author: JinwooHwang

geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/commands/MemberJvmOptions.java

@@ -48,7 +48,6 @@ public class MemberJvmOptions {
 
   static final List<String> JAVA_11_OPTIONS = Arrays.asList(
       COM_SUN_JMX_REMOTE_SECURITY_EXPORT,
-      SUN_NIO_CH_EXPORT,
       JAVA_LANG_OPEN,
       JAVA_NIO_OPEN);