feature #15219 [DependencyInjection] Added ParameterBagInterface::remove (lyrixx)

This PR was merged into the 3.0-dev branch.

Discussion
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[DependencyInjection] Added ParameterBagInterface::remove

| Q             | A
| ------------- | ---
| Bug fix?      | kinda
| New feature?  | no
| BC breaks?    | only between 2.X and 3.X, this PR target 3.X
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

I created this PR because the method is implemented in `ParameterBag` but is not declared in the interface.

Commits
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c13a4ff [DependencyInjection] Added ParameterBagInterface::remove

src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBagInterface.php

@@ -60,6 +60,13 @@ interface ParameterBagInterface
      */
     public function get($name);
 
+    /**
+     * Removes a parameter.
+     *
+     * @param string $name The parameter name
+     */
+    public function remove($name);
+
     /**
      * Sets a service container parameter.
      *