Remove unused Git attributes ident (#402)

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

Author: petk

config.m4

@@ -1,5 +1,3 @@
-dnl
-dnl $ Id: $
 dnl vim:se ts=2 sw=2 et:
 
 PHP_ARG_ENABLE(memcached, whether to enable memcached support,

config.w32

@@ -1,4 +1,3 @@
-// $ Id: $
 // vim:ft=javascript
 
 ARG_WITH('memcached', 'libmemcached extension', 'no');

php_memcached.c

@@ -14,8 +14,6 @@
   +----------------------------------------------------------------------+
 */
 
-/* $ Id: $ */
-
 /* TODO
  * - set LIBKETAMA_COMPATIBLE as the default?
  * - fix unserialize(serialize($memc))

php_memcached.h

@@ -14,8 +14,6 @@
   +----------------------------------------------------------------------+
 */
 
-/* $ Id: $ */
-
 #ifndef PHP_MEMCACHED_H
 #define PHP_MEMCACHED_H
 

php_memcached_private.h

@@ -14,8 +14,6 @@
   +----------------------------------------------------------------------+
 */
 
-/* $ Id: $ */
-
 #ifndef PHP_MEMCACHED_PRIVATE_H
 #define PHP_MEMCACHED_PRIVATE_H