Removing link from Header Logo in Catch Mustang Theme. Just add the following code in your child theme functions.php file. After you add this, make sure you cahnge any value in Theme Options panel to clear your cache

functions.php

/**
 * Get the Header Image from theme options
 * 
 * For header logo and site description.
 * @uses default Header Logo if Header Logo field on theme options is empty
 * @uses set_transient and delete_transient 
 */
function catchthemes_headerdetails() {
    //delete_transient( 'catchthemes_headerdetails' );
    
    global $catchthemes_theme_options_settings;
    $options = $catchthemes_theme_options_settings;
        
    if ( ( !$catchthemes_headerdetails = get_transient( 'catchthemes_headerdetails' ) ) && ( empty( $options[ 'disable_logo_header'] ) || empty( $options[ 'remove_site_title' ] ) || empty( $options[ 'disable_header_description' ] ) ) ) {        
           
        echo '<!-- refreshing cache -->';

        $catchthemes_headerdetails = '<hgroup class="clearfix">';
		
		if( empty( $options[ 'disable_logo_header' ] ) ) {
			$catchthemes_header_logo = '<h1 id="site-logo">';
				if ( !empty( $options[ 'featured_logo_header' ] ) ):
					$catchthemes_header_logo .= '<img src="'.esc_url( $options['featured_logo_header'] ).'" alt="'.get_bloginfo( 'name' ).'" />';
				else:
					// if empty featured_logo_header on theme options, display default logo
					$catchthemes_header_logo .='<img src="'. get_template_directory_uri().'/images/logo.png" alt="logo" />';
				endif;
			$catchthemes_header_logo .= '</h1>';		
		}
		else {
			$catchthemes_header_logo = '';
		}
		
		if ( empty( $options[ 'disable_header_title' ] ) || empty( $options[ 'disable_header_description' ] ) ) {
			
			$catchthemes_site_details = '<div id="site-details">';
			
			if( empty( $options[ 'disable_header_title' ] ) ) {
				$catchthemes_site_details .= '<h1 id="site-title"><a href="'.esc_url( home_url( '/' ) ).'" title="'.esc_attr( get_bloginfo( 'name', 'display' ) ).'">'.esc_attr( get_bloginfo( 'name', 'display' ) ).'</a></h1>'; 
			}
			if( empty( $options[ 'disable_header_description' ] ) ) {
				$catchthemes_site_details .= '<h2 id="site-description">'.esc_attr( get_bloginfo( 'description' ) ).'</h2>';
			}
			$catchthemes_site_details .= '</div>';
		}
		else {
			$catchthemes_site_details = '';
		}
		
		if ( empty( $options[ 'site_title_above'] ) ) {
			$catchthemes_headerdetails .= $catchthemes_header_logo . $catchthemes_site_details;
		}
		else {
			$catchthemes_headerdetails .= $catchthemes_site_details . $catchthemes_header_logo;
		}

        $catchthemes_headerdetails .= '</hgroup>';
        
    set_transient( 'catchthemes_headerdetails', $catchthemes_headerdetails, 86940 );
    }
    echo $catchthemes_headerdetails;   
}