ADoor - remove stale old bad code for door spinup

The door hinge still spins up and explodes just fine with this patch
applied, as code below lerps it downward properly anyway.

Undefined sanitizer complaint:

../Source/Entities/ADoor.cpp:470:24: runtime error: signed integer overflow: 671088640 * 4 cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../Source/Entities/ADoor.cpp:470:24

Author: Architector4

Source/Entities/ADoor.cpp

@@ -465,11 +465,6 @@ void ADoor::Update() {
 
 	Actor::Update();
 
-	// Start the spinning out of control animation for the motor, start it slow
-	if (!m_Door) {
-		m_SpriteAnimDuration *= 4;
-	}
-
 	if (m_SpriteAnimMode == LOOPWHENOPENCLOSE && m_FrameCount > 1 && (m_DoorState == OPENING || m_DoorState == CLOSING) && m_SpriteAnimTimer.IsPastSimMS(m_SpriteAnimDuration)) {
 		m_Frame = (m_Frame + 1) % m_FrameCount;
 		m_SpriteAnimTimer.Reset();