polly release notes: drop in-progress warnings; minor cleanups

Author: zmodem

polly/docs/ReleaseNotes.rst

@@ -1,17 +1,9 @@
-=============================
-Release Notes 11.0 (upcoming)
-=============================
+==================
+Release Notes 11.0
+==================
 
 In Polly 11 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.
-
-- Change ...
-
  * The LLVM option -polly-isl-arg was added to pass options to ISL's
    command line option parser. For instance,
    -polly-isl-arg=--schedule-algorithm=feautrier switches to the