Removed some unused functions (kindly pointed out by the great ncc tool)

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@796 416bcca6-2ee7-4201-b75f-2eb2f807beb1

misc.h

@@ -143,7 +143,6 @@ byte New_preview_is_needed; // Bool
 unsigned long Memory_free(void);
 
 void  Num2str(dword number,char * str,byte nb_char);
-int   Str2num(char * str);
 
 short Round(float value);
 short Round_div_max(short numerator,short divisor);