Have you tried deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
Ok, when I find one that made that and want to keep that plugin, how to remove just that part that placed it in wp_footer.
My question is where in database or where in code I can remove some parts of wp_footer ?
You can’t edit the wp_footer() function. That’s part of core and you should never edit core. And why would you want to remove that line? It’s part of what makes the plugin work.