Remove duplicate note about removing commits with git-filter-branch

A duplicate of an already existing section in the documentation of
git-filter-branch was added in commit
f95eef15f2.
This patch removes that redundant section.

Signed-off-by: Ulrik Sverdrup <ulrik.sverdrup@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-filter-branch.txt

@@ -220,11 +220,6 @@ git filter-branch --commit-filter '
 	fi' HEAD
 ------------------------------------------------------------------------------
 
-Note that the changes introduced by the commits, and not reverted by
-subsequent commits, will still be in the rewritten branch. If you want
-to throw out _changes_ together with the commits, you should use the
-interactive mode of gitlink:git-rebase[1].
-
 The function 'skip_commits' is defined as follows:
 
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