Bump version to v2.0.0rc2 (#2349)

* Bump version to v2.0.0rc2

* minor refine

mmcv/image/geometric.py

 # Copyright (c) OpenMMLab. All rights reserved.
 import numbers
-import warnings
 from typing import List, Optional, Tuple, Union, no_type_check
 
 import cv2
@@ -355,12 +354,6 @@ def imrotate(img: np.ndarray,
     Returns:
         np.ndarray: The rotated image.
     """
-    warnings.warn("We have added an arg 'border_mode' in this func "
-                  'and will reorder the args in the future as: '
-                  '( ..., scale: float = 1.0, '
-                  "border_mode: str = 'constant', "
-                  'border_value: int = 0, ... ). '
-                  'Please use keyword arguments to call this function.')
     if center is not None and auto_bound:
         raise ValueError('`auto_bound` conflicts with `center`')
     h, w = img.shape[:2]

mmcv/version.py

 # Copyright (c) OpenMMLab. All rights reserved.
-__version__ = '2.0.0rc1'
+__version__ = '2.0.0rc2'
 
 
 def parse_version_info(version_str: str, length: int = 4) -> tuple:
@@ -30,6 +30,6 @@ def parse_version_info(version_str: str, length: int = 4) -> tuple:
     return tuple(release)
 
 
-version_info = (2, 0, 0, 0, 'rc', 1)
+version_info = (2, 0, 0, 0, 'rc', 2)
 
 __all__ = ['__version__', 'version_info', 'parse_version_info']