[skip-ci] Clean useless functions

scripts/publisher_camera_info.py

 #!/usr/bin/env python3
-import sys
-import copy
-from pure_eval import CannotEval
 import yaml
-import numpy as np
 import rospy
-from sensor_msgs.msg import CameraInfo
-from sensor_msgs.msg import Image
+from sensor_msgs.msg import CameraInfo, Image
 
-def kvec2mat(fx, fy, cx, cy):
-    return np.array([
-    fx, 0,  cx,
-    0,  fy, cy,
-    0,  0,  0
-]).reshape((3,3))
-    
-    
-def kmat2vec(K):
-    # fx, fy, cx, cy
-    return [K[0,0], K[1,1], K[0,2], K[1,2]]
-    
 
 class CameraInfoPublisher: