Remove an XXX which hasn't been fixed yet. It's too late now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145518 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ReleaseNotes.html

@@ -821,9 +821,8 @@ <h3>
   <li>A new <a href="LangRef.html#int_fma">llvm.fma intrinsic</a> directly
     represents floating point multiply accumulate operations without an
     intermediate rounding stage.</li>
-  <li>A new llvm.expect intrinsic (XXX not documented in langref) allows a
-     frontend to express expected control flow (and the __builtin_expect builtin
-    from GNU C).</li>
+  <li>A new llvm.expect intrinsic allows a frontend to express expected control
+     flow (and the __builtin_expect builtin from GNU C).</li>
   <li>The <a href="LangRef.html#int_prefetch">llvm.prefetch intrinsic</a> now
     takes a 4th argument that specifies whether the prefetch happens from the
     icache or dcache.</li>