[Process] Update docs for modifications.

Author: Juan Traverso

components/process.rst

@@ -46,16 +46,10 @@ and :method:`Symfony\\Component\\Process\\Process::getIncrementalErrorOutput`
 methods returns the new outputs since the last call.
 
 .. versionadded:: 2.4
-    The ``getAndFlushOutput()``, ``getAndFlushIncrementalOutput()``, ``getAndFlushErrorOutput()``,
-    ``getAndFlushIncrementalErrorOutput()``, ``flushOutput()`` and ``flushErrorOutput()`` methods were
-    added in Symfony 2.4.
+    The ``flushOutput()`` and ``flushErrorOutput()`` methods were added in Symfony 2.4.
 
 The :method:`Symfony\\Component\\Process\\Process::flushOutput()` method flushes the contents of the output and
-and :method:`Symfony\\Component\\Process\\Process::flushErrorOutput()` the content of the error output. You can get the
-contents and flush the whole output or the error output by using :method:`Symfony\\Component\\Process\\Process::getAndFlushOutput()`
-and :method:`Symfony\\Component\\Process\\Process::getAndFlushErrorOutput()` methods, or the outputs since the last call
-by using the :method:`Symfony\\Component\\Process\\Process::getAndFlushIncrementalOutput()` and
-:method:`Symfony\\Component\\Process\\Process::getAndFlushIncrementalErrorOutput()` methods.
+and :method:`Symfony\\Component\\Process\\Process::flushErrorOutput()` the content of the error output.
 
 Getting real-time Process Output
 --------------------------------