An example of how to remove scripts from the EE Event/Venue pages. Currently this removes the Januas 'cmb-scripts' script file.

functions.php

<?php //Do not include the opneing PHP tag if you already have one.

//This functions can be used to remove scripts loaded by other plugins (or the sites theme) on EE Event/Venue pages.
function tw_ee_remove_scripts_from_event_editor( $hook_suffux ){

	$page = isset( $_GET['page'] ) ? $_GET['page'] : '';
	
	$action = isset( $_GET['action'] ) ? $_GET['action'] : '';
	
	if ( ( $hook_suffux == 'post.php' || $hook_suffux == 'post-new.php' ) && ( $page == 'espresso_events' || $page == 'espresso_venues' )  && ( $action == 'edit' || $action == 'create_new' ) ) {
		//This is an EE Event/Venue page, add scripts to remove in thi block
		wp_deregister_script( 'cmb-scripts' );
	}
}
add_filter( 'admin_enqueue_scripts', 'tw_ee_remove_scripts_from_event_editor', 20, 1 );

functions2.php

<?php //Do not include the opneing PHP tag if you already have one.

//@JoshFeck used a different method in the forum thread which completely removes the action added by Januas theme:

function tw_ee_remove_scripts_from_event_editor(){

    remove_action( 'admin_enqueue_scripts', 'cmb_scripts', 10 );

}
add_action( 'add_meta_boxes_espresso_events', 'tw_ee_remove_scripts_from_event_editor' );

Reference:

https://eventespresso.com/topic/unable-to-open-event-calendars-after-ee-4-9-22-update/