[newlib-cygwin/cygwin-3_0-branch] Cygwin: remove path_conv::is_fs_device()

[Ken Brown]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=585370924b1141b4615912176f7934644c9034e1

commit 585370924b1141b4615912176f7934644c9034e1
Author: Ken Brown <kbrown@cornell.edu>
Date:   Sat Jul 20 18:35:15 2019 -0400

    Cygwin: remove path_conv::is_fs_device()
    
    It is used only once.

Diff:
---
 winsup/cygwin/path.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/winsup/cygwin/path.h b/winsup/cygwin/path.h
index d1be1db..2fd9133 100644
--- a/winsup/cygwin/path.h
+++ b/winsup/cygwin/path.h
@@ -183,9 +183,9 @@ class path_conv
   int isfifo () const {return dev.is_device (FH_FIFO);}
   int isspecial () const {return dev.not_device (FH_FS);}
   int iscygdrive () const {return dev.is_device (FH_CYGDRIVE);}
-  int is_fs_device () const {return isdevice () && is_fs_special ();}
   int is_fs_special () const {return dev.is_fs_special ();}
-  int is_lnk_special () const {return is_fs_device () || isfifo () || is_lnk_symlink ();}
+  int is_lnk_special () const {return (isdevice () && is_fs_special ())
+      || isfifo () || is_lnk_symlink ();}
 #ifdef __WITH_AF_UNIX
   int issocket () const {return dev.is_device (FH_LOCAL)
 				|| dev.is_device (FH_UNIX);}