replace boost::bind with std::bind

src/ncmpcpp.cpp

@@ -48,6 +48,8 @@
 #include "title.h"
 #include "utility/conversion.h"
 
+namespace ph = std::placeholders;
+
 namespace
 {
 	std::ofstream errorlog;
@@ -225,7 +227,7 @@ int main(int argc, char **argv)
 			try
 			{
 				auto k = Bindings.get(input);
-				std::any_of(k.first, k.second, boost::bind(&Binding::execute, _1));
+				std::any_of(k.first, k.second, std::bind(&Binding::execute, ph::_1));
 			}
 			catch (ConversionError &e)
 			{