minor #10817 Add missing imports and remove useless (gregurco)

This PR was merged into the 3.4 branch.

Discussion
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Add missing imports and remove useless

I added importing of classes where it's quite important to provide it and removed where class is imported and not used in code block.

Commits
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a89cfa3 Add missing imports and remove useless

Author: javiereguiluz

components/console/helpers/questionhelper.rst

@@ -25,6 +25,7 @@ Suppose you want to confirm an action before actually executing it. Add
 the following to your command::
 
     // ...
+    use Symfony\Component\Console\Command\Command;
     use Symfony\Component\Console\Input\InputInterface;
     use Symfony\Component\Console\Output\OutputInterface;
     use Symfony\Component\Console\Question\ConfirmationQuestion;

components/console/helpers/table.rst

@@ -20,7 +20,10 @@ When building a console application it may be useful to display tabular data:
 To display a table, use :class:`Symfony\\Component\\Console\\Helper\\Table`,
 set the headers, set the rows and then render the table::
 
+    use Symfony\Component\Console\Command\Command;
     use Symfony\Component\Console\Helper\Table;
+    use Symfony\Component\Console\Input\InputInterface;
+    use Symfony\Component\Console\Output\OutputInterface;
     // ...
 
     class SomeCommand extends Command

console.rst

@@ -66,6 +66,10 @@ constructor. If your command defines its own constructor, set the properties
 first and then call to the parent constructor, to make those properties
 available in the ``configure()`` method::
 
+    // ...
+    use Symfony\Component\Console\Command\Command;
+    use Symfony\Component\Console\Input\InputArgument;
+
     class CreateUserCommand extends Command
     {
         // ...

console/calling_commands.rst

@@ -11,6 +11,8 @@ generating Doctrine2 proxies, dumping Assetic assets, ...).
 Calling a command from another one is straightforward::
 
     use Symfony\Component\Console\Input\ArrayInput;
+    use Symfony\Component\Console\Input\InputInterface;
+    use Symfony\Component\Console\Output\OutputInterface;
     // ...
 
     protected function execute(InputInterface $input, OutputInterface $output)

console/input.rst

@@ -14,6 +14,7 @@ or required. For example, to add an optional ``last_name`` argument to the comma
 and make the ``name`` argument required::
 
     // ...
+    use Symfony\Component\Console\Command\Command;
     use Symfony\Component\Console\Input\InputArgument;
 
     class GreetCommand extends Command
@@ -33,6 +34,10 @@ and make the ``name`` argument required::
 You now have access to a ``last_name`` argument in your command::
 
     // ...
+    use Symfony\Component\Console\Command\Command;
+    use Symfony\Component\Console\Input\InputInterface;
+    use Symfony\Component\Console\Output\OutputInterface;
+
     class GreetCommand extends Command
     {
         // ...

console/lockable_trait.rst

@@ -15,7 +15,10 @@ In addition, the Console component provides a PHP trait called ``LockableTrait``
 that adds two convenient methods to lock and release commands::
 
     // ...
+    use Symfony\Component\Console\Command\Command;
     use Symfony\Component\Console\Command\LockableTrait;
+    use Symfony\Component\Console\Input\InputInterface;
+    use Symfony\Component\Console\Output\OutputInterface;
 
     class UpdateContentsCommand extends Command
     {

console/verbosity.rst

@@ -41,6 +41,10 @@ It is possible to print a message in a command for only a specific verbosity
 level. For example::
 
     // ...
+    use Symfony\Component\Console\Command\Command;
+    use Symfony\Component\Console\Input\InputInterface;
+    use Symfony\Component\Console\Output\OutputInterface;
+
     class CreateUserCommand extends Command
     {
         // ...

event_dispatcher.rst

@@ -200,8 +200,6 @@ or a "sub request"::
     namespace AppBundle\EventListener;
 
     use Symfony\Component\HttpKernel\Event\GetResponseEvent;
-    use Symfony\Component\HttpKernel\HttpKernel;
-    use Symfony\Component\HttpKernel\HttpKernelInterface;
 
     class RequestListener
     {

http_cache/validation.rst

@@ -62,6 +62,7 @@ To see a simple implementation, generate the ETag as the md5 of the content::
     // src/AppBundle/Controller/DefaultController.php
     namespace AppBundle\Controller;
 
+    use Symfony\Bundle\FrameworkBundle\Controller\Controller;
     use Symfony\Component\HttpFoundation\Request;
 
     class DefaultController extends Controller

security/ldap.rst

@@ -100,7 +100,6 @@ An LDAP client can be simply configured using the built-in
         // app/config/services.php
         use Symfony\Component\Ldap\Ldap;
         use Symfony\Component\Ldap\Adapter\ExtLdap\Adapter;
-        use Symfony\Component\DependencyInjection\Definition;
 
         $container->register(Ldap::class)
             ->addArgument(new Reference(Adapter::class);