noDiscordBlockMsg.user.js

// ==UserScript==
// @name         Discord no Block MSG
// @namespace    https://petschko.org/discord/block/
// @description  Removes the message "x Blocked Message(s) - Show" from Discord-Chat
// @author       Peter Dragicevic [[email protected]]
// @version      1.0.3
// @encoding     utf-8
// @match        http://discord.com/*
// @match        https://discord.com/*
// @grant        none
// ==/UserScript==
/**
 * User-Script Body
 */
(function() {
   'use strict';
   //-------------------------------------------------- CSS-Area ---------------------------------------------------
   var cssCode = 'div[class^="container-"]{ min-height: 0; } div[class^="blockedSystemMessage-"], div[class*="blockedSystemMessage-"] { display: none; }';

   // Finally add the Code to the Head =)
   addCustomCSStoHeadEnd(cssCode);

   //------------------------------------------ Lib-Function-Area ------------------------------------------
   /**
    * Adds CSS-Code to the Head
    *
    * @param {string} cssCode - CSS-Code to add to the Head
    */
   function addCustomCSStoHeadEnd(cssCode) {
      var cssElement = document.createElement('style');
      var headElement = document.getElementsByTagName('head')[0];

      if(headElement === undefined || headElement === null) {
         alert('Your browser doesn\'t support this Script. (Maybe after updating it?) - HEAD-Element not found');

         return;
      }

      cssElement.innerHTML = cssCode;
      headElement.appendChild(cssElement);
   }
})();