minor symfony#19163 [Console] removed unneeded private methods (fabpot)

This PR was merged into the 2.7 branch.

Discussion
----------

[Console] removed unneeded private methods

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | https://github.com/symfony/symfony/pull/19134/files/3871e1a95056ce8278e6b86d3e8005836ecab954#r68286709
| License       | MIT
| Doc PR        | n/a

Commits
-------

35f32eb [Console] removed unneeded private methods

Author: fabpot

src/Symfony/Component/Console/Helper/ProgressBar.php

@@ -523,7 +523,7 @@ private function setMaxSteps($max)
     private function overwrite($message)
     {
         if ($this->overwrite) {
-            if (!$this->isFirstRun()) {
+            if (!$this->firstRun) {
                 // Move the cursor to the beginning of the line
                 $this->output->write("\x0D");
 
@@ -539,7 +539,7 @@ private function overwrite($message)
             $this->output->writeln('');
         }
 
-        $this->setFirstRun(false);
+        $this->firstRun = false;
 
         $this->output->write($message);
     }
@@ -632,14 +632,4 @@ private static function initFormats()
             'debug_nomax' => ' %current% [%bar%] %elapsed:6s% %memory:6s%',
         );
     }
-
-    private function isFirstRun()
-    {
-        return $this->firstRun;
-    }
-
-    private function setFirstRun($firstRun)
-    {
-        $this->firstRun = (bool) $firstRun;
-    }
 }