You may want to use the "allDayDefault" option of fullcalendar.js, see https://fullcalendar.io/docs/event_data/allDayDefault/

Hello,

you want to remove the time from all calendar views, or for that view only

if for all views search ("fc-event-time") in this file in the line <3992> :

C:\Users\pc\workspace\odoo-9\addons\web_calendar\static\lib\fullcalendar\js\fullcalendar.js

 You find  :

"<div class='fc-event-time'>" +
 

test with delete

Try and tell me the result