Drop support for XEmacs package EFS

EFS is a long defunct XEmacs-specific fork of Ange FTP that is
superseded by TRAMP.
* lisp/ffap.el (ffap-ftp-default-user)
(ffap-replace-file-component, ffap-host-to-filename):
* lisp/gnus/mml.el (mml-parse-file-name):
* lisp/gnus/nnheader.el (nnheader-re-read-dir):
* lisp/net/browse-url.el (browse-url-filename-alist):
* lisp/speedbar.el (speedbar-check-vc): Drop support for XEmacs
package EFS.

lisp/ffap.el

@@ -173,7 +173,7 @@ well-formed, such as \"user@host\" or \"<user@host>\"."
 (defcustom ffap-ftp-default-user "anonymous"
   "User name in FTP file names generated by `ffap-host-to-filename'.
 Note this name may be omitted if it equals the default
-\(either `efs-default-user' or `ange-ftp-default-user')."
+(`ange-ftp-default-user')."
   :type 'string
   :group 'ffap)
 
@@ -495,12 +495,9 @@ Returned values:
 
 (defun ffap-replace-file-component (fullname name)
   "In remote FULLNAME, replace path with NAME.  May return nil."
-  ;; Use efs if loaded, but do not load it otherwise.
-  (if (fboundp 'efs-replace-path-component)
-      (funcall 'efs-replace-path-component fullname name)
-    (and (stringp fullname)
-	 (stringp name)
-	 (concat (file-remote-p fullname) name))))
+  (and (stringp fullname)
+       (stringp name)
+       (concat (file-remote-p fullname) name)))
 ;; (ffap-replace-file-component "/who@foo.com:/whatever" "/new")
 
 (defun ffap-file-suffix (file)
@@ -569,9 +566,8 @@ Looks at `ffap-ftp-default-user', returns \"\" for \"localhost\"."
       ""
     (let ((user ffap-ftp-default-user))
       ;; Avoid including the user if it is same as default:
-      (if (or (equal user (ffap-symbol-value 'ange-ftp-default-user))
-	      (equal user (ffap-symbol-value 'efs-default-user)))
-	  (setq user nil))
+      (when (equal user (ffap-symbol-value 'ange-ftp-default-user))
+        (setq user nil))
       (concat "/" user (and user "@") host ":"))))
 
 (defun ffap-fixup-machine (mach)

lisp/gnus/mml.el

@@ -980,13 +980,10 @@ type detected."
 	  (symbol-name type) value))))))
 
 (defvar ange-ftp-name-format)
-(defvar efs-path-regexp)
 
 (defun mml-parse-file-name (path)
-  (if (if (boundp 'efs-path-regexp)
-	  (string-match efs-path-regexp path)
-	(if (boundp 'ange-ftp-name-format)
-	    (string-match (car ange-ftp-name-format) path)))
+  (if (and (boundp 'ange-ftp-name-format)
+           (string-match (car ange-ftp-name-format) path))
       (list (match-string 1 path) (match-string 2 path)
 	    (substring path (1+ (match-end 2))))
     path))

lisp/gnus/nnheader.el

@@ -918,15 +918,11 @@ first.  Otherwise, find the newest one, though it may take a time."
       (car (sort results #'file-newer-than-file-p)))))
 
 (defvar ange-ftp-path-format)
-(defvar efs-path-regexp)
 (defun nnheader-re-read-dir (path)
   "Re-read directory PATH if PATH is on a remote system."
-  (if (and (fboundp 'efs-re-read-dir) (boundp 'efs-path-regexp))
-      (when (string-match efs-path-regexp path)
-	(efs-re-read-dir path))
-    (when (and (fboundp 'ange-ftp-re-read-dir) (boundp 'ange-ftp-path-format))
-      (when (string-match (car ange-ftp-path-format) path)
-	(ange-ftp-re-read-dir path)))))
+  (when (and (fboundp 'ange-ftp-re-read-dir) (boundp 'ange-ftp-path-format))
+    (when (string-match (car ange-ftp-path-format) path)
+      (ange-ftp-re-read-dir path))))
 
 (defun nnheader-insert-file-contents (filename &optional visit beg end replace)
   "Like `insert-file-contents', q.v., but only reads in the file.

lisp/net/browse-url.el

@@ -403,7 +403,7 @@ commands reverses the effect of this variable."
 Any substring of a filename matching one of the REGEXPs is replaced by
 the corresponding STRING using `replace-match', not treating STRING
 literally.  All pairs are applied in the order given.  The default
-value converts ange-ftp/EFS-style file names into ftp URLs and prepends
+value converts ange-ftp-style file names into ftp URLs and prepends
 `file:' to any file name beginning with `/'.
 
 For example, adding to the default a specific translation of an ange-ftp

lisp/speedbar.el

@@ -2789,15 +2789,7 @@ to add more types of version control systems."
 	     (not (or (and (featurep 'ange-ftp)
 			   (string-match
 			    (car (symbol-value 'ange-ftp-name-format))
-			    (expand-file-name default-directory)))
-		      ;; efs support: Bob Weiner
-		      (and (featurep 'efs)
-			   (string-match
-			    (let ((reg (symbol-value 'efs-directory-regexp)))
-			      (if (stringp reg)
-				  reg
-				(car reg)))
-			    (expand-file-name default-directory))))))
+                            (expand-file-name default-directory))))))
 	(setq speedbar-vc-to-do-point 0))
     (if (numberp speedbar-vc-to-do-point)
 	(progn