Remove unused Git attributes ident

The `$Id$` keywords were used in CVS and 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.

TODO

@@ -1,5 +1,3 @@
-/* $Id$ */
-
 ToDo:
 - Convert to zend_parse_parameters
 - Unify error handling

config.m4

@@ -1,7 +1,3 @@
-dnl
-dnl $Id$
-dnl 
-
 AC_DEFUN([PHP_MCRYPT_CHECK_VERSION],[
   old_CPPFLAGS=$CPPFLAGS
   CPPFLAGS=-I$MCRYPT_DIR/include

config.w32

@@ -1,4 +1,3 @@
-// $Id$
 // vim:ft=javascript
 
 ARG_WITH("mcrypt", "mcrypt support", "no");

mcrypt.c

@@ -16,7 +16,6 @@
    |          Derick Rethans <derick@derickrethans.nl>                    |
    +----------------------------------------------------------------------+
  */
-/* $Id$ */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"

mcrypt_filter.c

@@ -14,8 +14,6 @@
   +----------------------------------------------------------------------+
   | Author: Sara Golemon <pollita@php.net>                               |
   +----------------------------------------------------------------------+
-
-  $Id$
 */
 
 #include "php.h"

php_mcrypt.h

@@ -16,7 +16,6 @@
    |          Derick Rethans <derick@derickrethans.nl>                    |
    +----------------------------------------------------------------------+
  */
-/* $Id$ */
 
 #ifndef PHP_MCRYPT_H
 #define PHP_MCRYPT_H

php_mcrypt_filter.h

@@ -14,8 +14,6 @@
   +----------------------------------------------------------------------+
   | Author: Sara Golemon <pollita@php.net>                               |
   +----------------------------------------------------------------------+
-
-  $Id$
 */
 
 #ifndef PHP_MCRYPT_FILTER_H