mesa: Remove GLES overlay.

With core mesa doing runtime API checks, GLES overlay is no longer
needed.  Make --enable-gles-overlay equivalent to --enable-gles[12].
There may still be places where compile-time checks are done.  They
could be fixed case by case.
diff --git a/docs/egl.html b/docs/egl.html
index a92f9d1..fb15086 100644
--- a/docs/egl.html
+++ b/docs/egl.html
@@ -88,17 +88,6 @@
 
 </li>
 
-<li><code>--enable-gles-overlay</code>
-
-<p>This option enables OpenGL ES as separate internal libraries.  This is an
-alternative approach to enable OpenGL ES.</p>
-
-<p>This is only supported by <code>egl_gallium</code>.  For systems using DRI
-drivers, <code>--enable-gles1</code> and <code>--enable-gles2</code> are
-suggested instead as all drivers will benefit.</p>
-
-</li>
-
 <li><code>--enable-openvg</code>
 
 <p>OpenVG must be explicitly enabled by this option.</p>
diff --git a/docs/opengles.html b/docs/opengles.html
index 63cc114..742182e 100644
--- a/docs/opengles.html
+++ b/docs/opengles.html
@@ -17,7 +17,7 @@
 
 <h2>Build the Libraries</h2>
 <ol>
-<li>Run <code>configure</code> with <code>--enable-gles-overlay</code> and enable the Gallium driver for your hardware.</li>
+<li>Run <code>configure</code> with <code>--enable-gles1 --enable-gles2</code> and enable the Gallium driver for your hardware.</li>
 <li>Build and install Mesa as usual.</li>
 </ol>
 
@@ -53,8 +53,6 @@
 	<tr><td>Library Name</td><td>Used By</td><td>Enabled</td><td>OpenGL</td><td>OpenGL ES 1.x</td><td>OpenGL ES 2.x</td></tr>
 	<tr><td><code>libmesa.a</td><td>Classic DRI drivers</td><td>y</td><td>y</td><td>--enable-gles1</td><td>--enable-gles2</td></tr>
 	<tr><td><code>libmesagallium.a</td><td>Gallium EGL and DRI drivers</td><td>y</td><td>y</td><td>--enable-gles1</td><td>--enable-gles2</td></tr>
-	<tr><td><code>libes1gallium.a</td><td>Gallium EGL drivers</td><td>--enable-gles-overlay</td><td>n</td><td>y</td><td>n</td></tr>
-	<tr><td><code>libes2gallium.a</td><td>Gallium EGL drivers</td><td>--enable-gles-overlay</td><td>n</td><td>n</td><td>y</td></tr>
 </table>
 
 <h3>Dispatch Table</h3>