Clean obsolete tools/filesystem abstraction

Change-Id: I74f99c48b822644b26486a66d2f15386991154d6
Reviewed-on: https://gerrit.libreoffice.org/2968Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Reviewed-by: Andras Timar <atimar@suse.com>
Tested-by: Andras Timar <atimar@suse.com>

tools/source/fsys/unx.hxx

@@ -26,8 +26,6 @@
 #include <dirent.h>
 #include <unistd.h>
 
-#define DRIVE_EXISTS(c) ( TRUE )
-
 #define _mkdir(p)       mkdir(p, 0777)
 #define _rmdir          rmdir
 #define _chdir          chdir

tools/source/fsys/wntmsc.hxx

@@ -50,7 +50,6 @@ typedef struct
     const char      *p;
 } DIR;
 
-#define PATHDELIMITER   ";"
 #define DEFSTYLE        FSYS_STYLE_NTFS
 #define MKDIR( p )      mkdir( p )
 #define CMP_LOWER(s)    ( s.toAsciiLowerCase() )