remove upgrade instructions for kernel.root_dir

Author: xabbuh

UPGRADE-3.3.md

@@ -254,12 +254,6 @@ HttpFoundation
 HttpKernel
 -----------
 
- * Deprecated the `kernel.root_dir` parameter. Use the new `kernel.project_dir`
-   parameter instead.
-
- * Deprecated the `Kernel::getRootDir()` method. Use the new `Kernel::getProjectDir()`
-   method instead.
-
  * The `Extension::addClassesToCompile()` and `Extension::getClassesToCompile()` methods have been deprecated and will be removed in 4.0.
 
  * The `Psr6CacheClearer::addPool()` method has been deprecated. Pass an array

UPGRADE-4.0.md

@@ -361,12 +361,6 @@ HttpFoundation
 HttpKernel
 ----------
 
- * Removed the `kernel.root_dir` parameter. Use the `kernel.project_dir` parameter
-   instead.
-
- * Removed the `Kernel::getRootDir()` method. Use the `Kernel::getProjectDir()`
-   method instead.
-
  * The `Extension::addClassesToCompile()` and `Extension::getClassesToCompile()` methods have been removed.
 
  * Possibility to pass non-scalar values as URI attributes to the ESI and SSI