Remove checking C++11 support by definied var

On windows it doesn't work should check by using check features

https://stackoverflow.com/questions/14131454/visual-studio-2012-cplusplus-and-c-11

include/eventbus/EventBus.h

@@ -9,10 +9,6 @@
 #include <typeinfo>
 #include <vector>
 
-#if __cplusplus < 201103L
-	#error This library needs at least a C++11 compliant compiler
-#endif
-
 namespace Dexode
 {