Remove dead code

No functional change.

Closes #87

src/ucioption.cpp

@@ -22,7 +22,6 @@
 #include <cstdlib>
 #include <sstream>
 
-#include "evaluate.h"
 #include "misc.h"
 #include "thread.h"
 #include "tt.h"
@@ -36,7 +35,6 @@ namespace UCI {
 
 /// 'On change' actions, triggered by an option's value change
 void on_logger(const Option& o) { start_logger(o); }
-void on_eval(const Option&) { Eval::init(); }
 void on_threads(const Option&) { Threads.read_uci_options(); }
 void on_hash_size(const Option& o) { TT.resize(o); }
 void on_clear_hash(const Option&) { TT.clear(); }