Removed duplicate php_libxml_(init|shutdown) they are already done by

ext/libxml.

ext/dom/php_dom.c

@@ -631,8 +631,6 @@ PHP_MINIT_FUNCTION(dom)
 	REGISTER_LONG_CONSTANT("DOM_INVALID_ACCESS_ERR",	INVALID_ACCESS_ERR,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("DOM_VALIDATION_ERR",		VALIDATION_ERR,			CONST_CS | CONST_PERSISTENT);
 
-	php_libxml_initialize();
-
 	return SUCCESS;
 }
 /* }}} */
@@ -663,8 +661,6 @@ PHP_MINFO_FUNCTION(dom)
 
 PHP_MSHUTDOWN_FUNCTION(dom)
 {
-	php_libxml_shutdown();
-
 	zend_hash_destroy(&dom_domstringlist_prop_handlers);
 	zend_hash_destroy(&dom_namelist_prop_handlers);
 	zend_hash_destroy(&dom_domimplementationlist_prop_handlers);

ext/simplexml/simplexml.c

@@ -1533,8 +1533,6 @@ PHP_MINIT_FUNCTION(simplexml)
 	sxe_object_handlers.get_class_entry = zend_get_std_object_handlers()->get_class_entry;
 	sxe_object_handlers.get_class_name = zend_get_std_object_handlers()->get_class_name;
 
-	php_libxml_initialize();
-
 	return SUCCESS;
 }
 /* }}} */
@@ -1543,8 +1541,6 @@ PHP_MINIT_FUNCTION(simplexml)
  */
 PHP_MSHUTDOWN_FUNCTION(simplexml)
 {
-	php_libxml_shutdown();
-
 	return SUCCESS;
 }
 /* }}} */

ext/xml/xml.c

@@ -247,10 +247,7 @@ PHP_MINIT_FUNCTION(xml)
 #else
 	REGISTER_STRING_CONSTANT("XML_SAX_IMPL", "expat", CONST_CS|CONST_PERSISTENT);
 #endif
-	
-#ifdef LIBXML_EXPAT_COMPAT
-	php_libxml_initialize();
-#endif
+
 	return SUCCESS;
 }
 
@@ -263,9 +260,6 @@ PHP_RINIT_FUNCTION(xml)
 
 PHP_MSHUTDOWN_FUNCTION(xml)
 {
-#ifdef LIBXML_EXPAT_COMPAT
-	php_libxml_shutdown();
-#endif
 	return SUCCESS;
 }