ReleaseNotes: drop in-progress warning

git-svn-id: https://llvm.org/svn/llvm-project/polly/branches/release_39@279130 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 780b6e3..3b3a3a7 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -4,12 +4,6 @@
 
 In Polly 3.9 the following important changes have been incorporated.
 
-.. warning::
-
-  These releaes notes are for the next release of Polly and describe
-  the new features that have recently been committed to our development
-  branch.
-
 Polly directly available in clang/opt/bugpoint
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