Remove reference to missing sniff

Signed-off-by: George Steel <[email protected]>

Author: gsteel

phpcs.xml

@@ -7,9 +7,9 @@
     <arg name="colors"/>
     <arg name="extensions" value="php"/>
     <arg name="parallel" value="80"/>
-    
+
     <!-- Show progress -->
-    <arg value="p"/>
+    <arg value="ps"/>
 
     <!-- Paths to check -->
     <file>src</file>
@@ -18,10 +18,6 @@
     <!-- Include all rules from the Laminas Coding Standard -->
     <rule ref="LaminasCodingStandard"/>
 
-    <rule ref="SlevomatCodingStandard.Classes.UnusedPrivateElements.WriteOnlyProperty">
-        <exclude-pattern>src/CacheSessionPersistence.php</exclude-pattern>
-    </rule>
-
     <rule ref="Generic.Files.LineLength.TooLong">
         <exclude-pattern>test/CacheSessionPersistenceTest.php</exclude-pattern>
     </rule>