How to remove script tag shown bellow from the wordpress page using php or javascript.
<script type="application/ld+json">{"@context":"http://schema.org","@type":"BlogPosting","mainEntityOfPage":"http://domain.com/190415-%d8%a5%d8%b0%d8%a7-%d9%83%d9%86%d8%aa-%d8%aa%d9%86%d9%88%d9%8a-%d8%b2%d9%8a%d8%a7%d8%b1%d8%a9-%d8%a3%d9%88%d8%b1%d9%88%d8%a8%d8%a7-%d9%87%d8%b0%d8%a7-%d8%a7%d9%84%d8%b5%d9%8a%d9%81%d8%8c-%d8%ad%d8%b3%d8%a7%d8%a8%d8%a7%d8%aa-%d8%a7%d9%86%d8%b3%d8%aa%d9%82%d8%b1%d8%a7%d9%85-%d9%87%d8%b0%d9%87-%d8%b3%d8%aa%d9%83%d9%88%d9%86-%d8%af%d9%84%d9%8a%d9%84%d9%83/","publisher":{"@type":"Organization","name":"u0634u0628u0643u0629 u0623u0628u0648 u0646u0648u0627u0641","logo":{"@type":"ImageObject","url":"http://domain.com/wp-content/uploads/2016/02/favicon.png","height":32,"width":32}},"headline":"u0625u0630u0627 u0643u0646u062a u062au0646u0648u064a u0632u064au0627u0631u0629 u0623u0648u0631u0648u0628u0627 u060c u062du0633u0627u0628u0627u062a u0627u0646u0633u062au0642u0631u0627u0645 u0633u062au0643u0648u0646 u062fu0644u064au0644u0643","datePublished":"2015-04-20T19:14:41+00:00","dateModified":"2016-02-01T11:12:42+00:00","author":{"@type":"Person","name":"u0645u062du0631u0631u0661"},"image":{"@type":"ImageObject","url":"http://domain.com/wp-content/uploads/2015/04/Europ.jpg","width":950,"height":534}}</script>
From Head tag.
How can do that
Depends on where the tag gets injected. Check you header.php file in Theme directory, if it’s not the one, try disabling all plugins one by one to see which one adds that tag.