Well due to the school of hard knocks, back 15 yrs ago or so I ruined a stock carb on a weedie conversion by completely removing the spring.

Removing the staked screws from the plate on that carb to get the shaft out was not a good idea as you cannot get the screws back like factory had them fastened.

You can reposition the throttle plate back in the correct position and LocTite the screws but . . . .

The spring acts as a tension type locator for the throttle shaft and without the spring, the throttle plate locates the shaft. The edges of the plate drag on the throttle bore and causes additional friction, more so than what the spring does. Needless to say, after figuring this out, the carb went into the junk box.

Leaving the spring on the carb, some people were cutting the tang end from the spring but you can never hook the spring back onto the arm.

As said by others, on most carbs, a standard 40 oz servo will overcome the spring tension just fine and the spring tension keeps all the slack out of your throttle linkage providing better control and reducing wear.