Remove Emacs 23 compat code from Tramp

* doc/misc/tramp.texi (Remote processes): Don't mention
Emacs 24 explicitely.
(Frequently Asked Questions): Remove Emacs 23 from
compatibility list.

* lisp/net/tramp.el:
* lisp/net/tramp-adb.el:
* lisp/net/tramp-cache.el:
* lisp/net/tramp-gvfs.el:
* lisp/net/tramp-sh.el:
* lisp/net/tramp-smb.el: Replace compat function calls.

* lisp/net/tramp-compat.el (remote-file-name-inhibit-cache)
(tramp-compat-condition-case-unless-debug)
(tramp-compat-copy-file, tramp-compat-copy-directory)
(tramp-compat-delete-file, tramp-compat-delete-directory)
(tramp-compat-process-live-p): Remove them.

* lisp/net/trampver.el: Make version check fit for Emacs 24.

1 files changed, 3 insertions, 5 deletions

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index 179578eea9b..4ca393256f6 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -2553,9 +2553,8 @@ when using @value{tramp} between two hosts with different operating
 systems, such as @samp{windows-nt} and @samp{gnu/linux}.  This option
 ensures the correct name of the remote shell program.
 
-Starting with Emacs 24, when @option{explicit-shell-file-name} is
-equal to @code{nil}, calling @code{shell} interactively will prompt
-for a shell name.
+When @option{explicit-shell-file-name} is equal to @code{nil}, calling
+@code{shell} interactively will prompt for a shell name.
 
 Starting with Emacs 26, you could use connection-local variables for
 setting different values of @option{explicit-shell-file-name} for
@@ -2856,8 +2855,7 @@ Where is the latest @value{tramp}?
 @item
 Which systems does it work on?
 
-The package works successfully on Emacs 23, Emacs 24, Emacs 25, and
-Emacs 26.
+The package works successfully on Emacs 24, Emacs 25, and Emacs 26.
 
 While Unix and Unix-like systems are the primary remote targets,
 @value{tramp} has equal success connecting to other platforms, such as