Revert "fix(quests): prevent very high damage for all quests" (@lemoness

@deilann - now it's just world boss, capped 900)

This reverts commit 89369e21a3.

src/models/user.js

@@ -403,13 +403,6 @@ UserSchema.pre('save', function(next) {
 
   this.achievements.beastMaster = petCount >= 90;
 
-  var progress = this.party && this.party.quest && this.party.quest.progress;
-  if (progress) {
-    // hack: prevent crazy damage to bosses (see https://github.com/HabitRPG/habitrpg/issues/3712)
-    progress.up = Math.min(300, Math.abs(progress.up||0));
-    progress.down = -Math.min(300, Math.abs(progress.down||0));
-  }
-
   //our own version incrementer
   this._v++;
   next();