Update README.md

Removed the zenodo DOI as it was version-specific.

README.md

@@ -14,5 +14,3 @@ W-L. Chang, R. Wong, W-Y. Chung, Y-H. Chen, J-C. Chen, and A.V. Vasilakos
 You may need to adjust the variable t in the CNOT gate. It is currently set to the highest possible value indicating that we expect the highest possible cut. So, if your output is not producing two spikes (= a maxcut was found), t should be decreased and the code executed again. Repeat this procedure till the maxcut is found.
 
 You may also need to adjust the variable R used for calculating the number of algorithm iterations. It is currently set to 2 as we expect a single max-cut. If you expect there might be more than one, try setting this value to 2 * expected_number_of_maxcuts.
-
-[![DOI](https://zenodo.org/badge/621613674.svg)](https://zenodo.org/badge/latestdoi/621613674)