Remove some useless include

Spotted by Rein Halbersma.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/move.cpp

@@ -25,7 +25,7 @@
 
 #include "move.h"
 #include "movegen.h"
-#include "search.h"
+#include "position.h"
 
 using std::string;
 

src/movegen.cpp

@@ -21,6 +21,7 @@
 
 #include "bitcount.h"
 #include "movegen.h"
+#include "position.h"
 
 // Simple macro to wrap a very common while loop, no facny, no flexibility,
 // hardcoded list name 'mlist' and from square 'from'.

src/movegen.h

@@ -21,7 +21,6 @@
 #define MOVEGEN_H_INCLUDED
 
 #include "move.h"
-#include "position.h"
 
 enum MoveType {
   MV_CAPTURE,

src/position.cpp

@@ -30,7 +30,6 @@
 #include "rkiss.h"
 #include "thread.h"
 #include "tt.h"
-#include "ucioption.h"
 
 using std::string;
 using std::cout;