jme3-vr: delete 2 unused imports

jme3-vr/src/main/java/com/jme3/input/vr/VRInputAPI.java

@@ -4,8 +4,6 @@ import com.jme3.math.Quaternion;
 import com.jme3.math.Vector2f;
 import com.jme3.math.Vector3f;
 
-import java.util.Collection;
-
 /**
  * An interface that represents a VR input (typically a VR device such as a controller).
  * @author reden - phr00t - https://github.com/phr00t

jme3-vr/src/main/java/com/jme3/input/vr/lwjgl_openvr/LWJGLOpenVRInput.java

@@ -2,7 +2,6 @@ package com.jme3.input.vr.lwjgl_openvr;
 
 import java.nio.LongBuffer;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;