reverted changes for readme.md

Author: anirudherabelly

README.md

@@ -13,7 +13,6 @@ ACM-ICPC Algorithms is a collection of important algorithms and data structures
 -  C
 -  C++
 -  Java
--  c#
 -  Python (2 & 3)
 -  Kotlin.
 ##### For more information, visit: **Official Website of [ICPC](https://icpc.baylor.edu/)**