Fix _version.py and various version-related issues (#539)

- Removed unnecessary logic in setup.py
- Fix versioneer issues

Signed-off-by: M Q <mingmelvinq@nvidia.com>

Author: MMelQin

docs/source/release_notes/v3.0.0.md

@@ -1,4 +1,4 @@
-# Version 2.0.0 (April 24th, 2024)
+# Version 3.0.0 (April 22nd, 2025)
 
 ## What's new in 3.0.0
 

monai/deploy/__init__.py

@@ -23,3 +23,6 @@
 from . import _version, conditions, core, exceptions, logger, resources, utils
 
 __version__ = _version.get_versions()["version"]
+
+from . import _version
+__version__ = _version.get_versions()['version']