minor #16414 removed all @Covers annotations (fabpot)

This PR was merged into the 2.3 branch.

Discussion
----------

removed all @Covers annotations

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Some unit tests have a `@covers` PHPUnit annotations. Most of them were added a very long time ago, but since then, we did not use them anymore and the existing ones are not maintained (see #16413). So, I propose to remove them all.

Commits
-------

1e0af36 removed all @Covers annotations

Author: fabpot

Tests/Helper/HelperSetTest.php

@@ -16,9 +16,6 @@
 
 class HelperSetTest extends \PHPUnit_Framework_TestCase
 {
-    /**
-     * @covers \Symfony\Component\Console\Helper\HelperSet::__construct
-     */
     public function testConstructor()
     {
         $mock_helper = $this->getGenericMockHelper('fake_helper');
@@ -28,9 +25,6 @@ public function testConstructor()
         $this->assertTrue($helperset->has('fake_helper_alias'), '__construct sets helper alias for given helper');
     }
 
-    /**
-     * @covers \Symfony\Component\Console\Helper\HelperSet::set
-     */
     public function testSet()
     {
         $helperset = new HelperSet();
@@ -49,19 +43,13 @@ public function testSet()
         $this->assertTrue($helperset->has('fake_helper_alias'), '->set() adds helper alias when set');
     }
 
-    /**
-     * @covers \Symfony\Component\Console\Helper\HelperSet::has
-     */
     public function testHas()
     {
         $helperset = new HelperSet(array('fake_helper_alias' => $this->getGenericMockHelper('fake_helper')));
         $this->assertTrue($helperset->has('fake_helper'), '->has() finds set helper');
         $this->assertTrue($helperset->has('fake_helper_alias'), '->has() finds set helper by alias');
     }
 
-    /**
-     * @covers \Symfony\Component\Console\Helper\HelperSet::get
-     */
     public function testGet()
     {
         $helper_01 = $this->getGenericMockHelper('fake_helper_01');
@@ -82,9 +70,6 @@ public function testGet()
         }
     }
 
-    /**
-     * @covers \Symfony\Component\Console\Helper\HelperSet::setCommand
-     */
     public function testSetCommand()
     {
         $cmd_01 = new Command('foo');
@@ -100,9 +85,6 @@ public function testSetCommand()
         $this->assertEquals($cmd_02, $helperset->getCommand(), '->setCommand() overwrites stored command with consecutive calls');
     }
 
-    /**
-     * @covers \Symfony\Component\Console\Helper\HelperSet::getCommand
-     */
     public function testGetCommand()
     {
         $cmd = new Command('foo');