Hi @athavale.anant,
The panic is unwarranted – but if you want to disable that feature, edit plugins/generic/tinymce/TinyMCEPlugin.inc.php and remove jbimages from the plugin list (there are 3 references to it). Then remove lib/pkp/lib/tinymce/jscripts/tiny_mce/plugins/jbimages and its contents. Finally, review the images in the public/site/images (and subdirectories) and remove anything you don’t like the look of.
[Edit: For current releases of OJS and OMP, the relevant place to find jbimages references is in lib/pkp/js/controllers/SiteHandler.js. If you’re using minified javascript (see config.inc.php) you may need to rebuilt the Javascript after editing. Or, to be expedient, edit js/pkp.min.js to remove references to jbimages there too.]
Regards,
Alec Smecher
Public Knowledge Project Team