Remove unused private property LinkCache::$mClassVer

This was added in r2084 / c280ef342b64 for a "persistent link cache"
feature, which became obsolete in 1.4 and was removed in 1.5.

https://www.mediawiki.org/wiki/Manual:$wgEnablePersistentLC

Follows-up r9276 / cb45389b9c4d.

Change-Id: I2f27d6acc1a1f9a9382a47d56921f570107a7be9

diff --git a/includes/cache/LinkCache.php b/includes/cache/LinkCache.php
index 56c9256..3db84a6 100644 (file)
--- a/includes/cache/LinkCache.php
+++ b/includes/cache/LinkCache.php
@@ -27,10 +27,6 @@
  * @ingroup Cache
  */
 class LinkCache {
-       // Increment $mClassVer whenever old serialized versions of this class
-       // becomes incompatible with the new version.
-       private $mClassVer = 5;
-
        /**
         * @var MapCacheLRU
         */