Remove Filters of class files with out invoking class.

functions.php

<?php
function remove_class_filter( $tag, $class_name = '', $method_name = '', $priority = 10 ) {
  	global $wp_filter;
  	// Check that filter actually exists first
  	if ( ! isset( $wp_filter[ $tag ] ) ) return FALSE;
  	if ( is_object( $wp_filter[ $tag ] ) && isset( $wp_filter[ $tag ]->callbacks ) ) {
  		// Create $fob object from filter tag, to use below
  		$fob = $wp_filter[ $tag ];
  		$callbacks = &$wp_filter[ $tag ]->callbacks;
  	} else {
  		$callbacks = &$wp_filter[ $tag ];
  	}
  	// Exit if there aren't any callbacks for specified priority
  	if ( ! isset( $callbacks[ $priority ] ) || empty( $callbacks[ $priority ] ) ) return FALSE;
  	// Loop through each filter for the specified priority, looking for our class & method
  	foreach( (array) $callbacks[ $priority ] as $filter_id => $filter ) {
  		// Filter should always be an array - array( $this, 'method' ), if not goto next
  		if ( ! isset( $filter[ 'function' ] ) || ! is_array( $filter[ 'function' ] ) ) continue;
  		// If first value in array is not an object, it can't be a class
  		if ( ! is_object( $filter[ 'function' ][ 0 ] ) ) continue;
  		// Method doesn't match the one we're looking for, goto next
  		if ( $filter[ 'function' ][ 1 ] !== $method_name ) continue;
  		// Method matched, now let's check the Class
  		if ( get_class( $filter[ 'function' ][ 0 ] ) === $class_name ) {
  			// WordPress 4.7+ use core remove_filter() since we found the class object
  			if( isset( $fob ) ){
  				// Handles removing filter, reseting callback priority keys mid-iteration, etc.
  				$fob->remove_filter( $tag, $filter['function'], $priority );
  			} else {
  				// Use legacy removal process (pre 4.7)
  				unset( $callbacks[ $priority ][ $filter_id ] );
  				// and if it was the only filter in that priority, unset that priority
  				if ( empty( $callbacks[ $priority ] ) ) {
  					unset( $callbacks[ $priority ] );
  				}
  				// and if the only filter for that tag, set the tag to an empty array
  				if ( empty( $callbacks ) ) {
  					$callbacks = array();
  				}
  				// Remove this filter from merged_filters, which specifies if filters have been sorted
  				unset( $GLOBALS['merged_filters'][ $tag ] );
  			}
  			return TRUE;
  		}
  	}
  	return FALSE;
  }