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-Delete old wp
-Re-install  wp
-create new database for wp
-and using following php code for reclare class error

if(class_exists('WP_Themes_List_Table') != true){
//code
}

for sharing server, CPanel is free, for VPS server, I need to buy package license from Cpanel
with $14 USD/month  for 15 licenses.
 I don't have any hosting clients and I don't need Cpanel License
So I don't want to pay addition $14/month for Cpanel

Just curious... How much money are you saving by removing cPanel?  I don't really need to know -- it's a rhetorical question, intended to lead you in the direction of discerning value versus price.  Weigh the financial savings against the cost of inconvenience and disruption that it seems to be causing for you.

I have read all google stuff and find no solution.

Do you think I delete all cpanel cron-job in cron file since it is expired,
and that might be helping to solve the issue ?

0 6 * * * /usr/local/cpanel/scripts/exim_tidydb > /dev/null 2>&1
30 5 * * * /usr/local/cpanel/scripts/optimize_eximstats > /dev/null 2>&1
47 21 * * * /usr/local/cpanel/scripts/upcp --cron
0 1 * * * /usr/local/cpanel/scripts/cpbackup
35 * * * * /usr/bin/test -x /usr/local/cpanel/bin/tail-check && /usr/local/cpanel/bin/tail-check
45 */4 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_mailman_cache && /usr/local/cpanel/scripts/update_mailman_cache
30 */4 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_db_cache && /usr/local/cpanel/scripts/update_db_cache
45 */8 * * * /usr/bin/test -x /usr/local/cpanel/bin/optimizefs && /usr/local/cpanel/bin/optimizefs
30 */2 * * * /usr/local/cpanel/bin/mysqluserstore >/dev/null 2>&1
15 */2 * * * /usr/local/cpanel/bin/dbindex >/dev/null 2>&1
15 */6 * * * /usr/local/cpanel/scripts/autorepair recoverymgmt >/dev/null 2>&1
*/5 * * * * /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1
59 5 * * * /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
10,25,40,55 * * * * /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1

Have you tried this wp forum post?

http://wordpress.org/support/topic/cannot-redeclare-class-walker_page-after-attempted-update

I have reboot my VPS server a lot of times after Cpanel expired.
what should I check on php.ini

I'm just guessing but probably the problem is that cpanel uninstall messed up your php configuration. Did you restart apache after cpanel uninstall? Did you check your php.ini file for errors?