Step 1: Access console by clicking F1

Step 2: Copy and paste this graphics.vm_fov_scale false

Step 3: (Optional) If you want to change your ads sensitivity which is your sensitivity while aiming copy and paste this into console and change the numbers to your liking, the first set of numbers being your hipfire sensitivity while the second pair being your ADS sensitivity.

bind mouse1 "+attack2;+input.sensitivity .45;input.sensitivity .4;"