Remove unused x and y attributes of blockclass

These float attributes are assigned to, and then never read again. The
coordinate systems of blocks are a bit of a mess - some use xp/yp, some
use xp/yp and rect.x/rect.y - but I can confidently say that these are
never used, because it compiles fine if I remove the attributes from the
class, plus remove all assignments to it.

desktop_version/src/BlockV.h

@@ -21,11 +21,6 @@ public:
     int xp, yp, wp, hp;
     std::string script, prompt;
     int r, g, b;
-
-    //These would come from the sprite in the flash
-    float x;
-    float y;
-
 };
 
 #endif /* BLOCKV_H */