remove unknown details
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46985 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index ec6ba19..6e9e403 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -303,10 +303,8 @@
advantage of its predication features.</li>
<li>Bruno added PIC support to the MIPS backend, fixed many bugs and improved
support for architecture variants.</li>
-<li>Arnold Schwaighofer added support for X86 tail calls (limitations?
-details?).</li>
-<li>Evan contributed several enhancements to Darwin/x86 debug information,
-and improvements at -O0 (details?).</li>
+<li>Arnold Schwaighofer added initial support for X86 tail calls.</li>
+<li>Evan contributed several enhancements to Darwin/x86 debug information.</li>
<li>Duncan added x86-64 support for trampolines (pointers to nested functions).</li>
</ul>