Update readme

Author: nghia-vo

README.md

@@ -18,7 +18,7 @@
 in lens-based imaging systems ([1](https://doi.org/10.1364/OE.23.032859), [2](https://doi.org/10.1107/S1600577525002267)). 
 Unlike existing approaches that require multiple calibration images or iterative optimization, 
 Discorpy and its algorithms can independently characterize both radial and perspective distortion 
-with high accuracy across a wide range of distortion strengths—using only a single calibration image 
+with high accuracy across a wide range of distortion strengths - using only a single calibration image 
 and direct computation. This makes the software a practical tool for a wide range of imaging applications.
 
 **Author and maintainer:** Nghia Vo, *NSLS-II, Brookhaven National Laboratory, US; Diamond Light Source, UK.*

setup.py

@@ -2,9 +2,6 @@
 import setuptools
 import sys
 
-py_ver = sys.version.split(".")[:2]
-python_version = py_ver[0] + "." + py_ver[1]
-
 dependencies = [
     "scikit-image",
     "scipy",