removed the additional empty line

Author: xiaomaogy

README.md

@@ -2,7 +2,6 @@
 
 # Unity ML-Agents (Beta)
 
-
 **Unity Machine Learning Agents** (ML-Agents) is an open-source Unity plugin 
 that enables games and simulations to serve as environments for training
 intelligent agents. Agents can be trained using reinforcement learning,
@@ -79,4 +78,4 @@ team at [email protected].
 
 ## License
 
-[Apache License 2.0](LICENSE)
+[Apache License 2.0](LICENSE)