Merge branch '2.7' into 2.8

* 2.7:
  Remove some unused variables, properties and methods
  [ExpressionLanguage] Fix parse error on 5.3
  [HttpKernel] remove noisy frame in controller stack traces
  [ExpressionLanguage] throw an SyntaxError instead of letting a undefined index notice
  Fix php doc in Table class
  bumped Symfony version to 2.7.40
  updated VERSION for 2.7.39
  update CONTRIBUTORS for 2.7.39
  updated CHANGELOG for 2.7.39

Author: nicolas-grekas

Compiler/AnalyzeServiceReferencesPass.php

@@ -30,7 +30,6 @@ class AnalyzeServiceReferencesPass implements RepeatablePassInterface
     private $container;
     private $currentId;
     private $currentDefinition;
-    private $repeatedPass;
     private $onlyConstructorArguments;
 
     /**
@@ -46,7 +45,7 @@ public function __construct($onlyConstructorArguments = false)
      */
     public function setRepeatedPass(RepeatedPass $repeatedPass)
     {
-        $this->repeatedPass = $repeatedPass;
+        // no-op for BC
     }
 
     /**

Compiler/InlineServiceDefinitionsPass.php

@@ -23,7 +23,6 @@
  */
 class InlineServiceDefinitionsPass implements RepeatablePassInterface
 {
-    private $repeatedPass;
     private $graph;
     private $compiler;
     private $formatter;
@@ -34,7 +33,7 @@ class InlineServiceDefinitionsPass implements RepeatablePassInterface
      */
     public function setRepeatedPass(RepeatedPass $repeatedPass)
     {
-        $this->repeatedPass = $repeatedPass;
+        // no-op for BC
     }
 
     /**