doc: remove DRAFT tags from go1.6.html

Go 1.6 is soon (but not yet).

Fixes #14301.

Change-Id: I85e329b643adcb5d4fa680c5333fbc1f928d4d9d
Reviewed-on: https://go-review.googlesource.com/19550Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Chris Broadfoot <cbro@golang.org>

doc/go1.6.html

 <!--{
-	"Title": "Go 1.6 Release Notes DRAFT",
+	"Title": "Go 1.6 Release Notes",
 	"Path":  "/doc/go1.6",
 	"Template": true
 }-->
@@ -13,14 +13,6 @@ Edit .,s;^([a-z][A-Za-z0-9_/]+)\.([A-Z][A-Za-z0-9_]+\.)?([A-Z][A-Za-z0-9_]+)([ .
 ul li { margin: 0.5em 0; }
 </style>
 
-<p>
-<i>NOTE: This is a DRAFT of the Go 1.6 release notes, prepared for the Go 1.6 beta.
-Go 1.6 has NOT yet been released.
-By our regular schedule, it is expected some time in February 2016.
-<!-- NOTE: WHEN REMOVING THIS COMMENT FIX THE TITLE AT THE TOP OF THE FILE TOO! -->
-</i>
-</p>
-
 <h2 id="introduction">Introduction to Go 1.6</h2>
 
 <p>