VideoCommon/Statistics: Remove unused setter macros for statistics

Now that the floating point members are assigned in bulk, we can remove
their setter macro. While we're at it, we can also remove the setter for
unsigned int, given it's not used.

Source/Core/VideoCommon/Statistics.h

@@ -76,8 +76,6 @@ extern Statistics stats;
 #define DECSTAT(a) (a)--;
 #define ADDSTAT(a, b) (a) += (b);
 #define SETSTAT(a, x) (a) = (int)(x);
-#define SETSTAT_UINT(a, x) (a) = (u32)(x);
-#define SETSTAT_FT(a, x) (a) = (float)(x);
 #else
 #define INCSTAT(a) ;
 #define ADDSTAT(a, b) ;