docs: Update some out of date sourcetree information

Reviewed-by: Andreas Boll <andreas.boll.dev@gmail.com>
Signed-off-by: Andreas Boll <andreas.boll.dev@gmail.com>

docs/devinfo.html

@@ -36,7 +36,7 @@ To add a new GL extension to Mesa you have to do at least the following.
    </pre>
 </li>
 <li>
-   In the src/mesa/glapi/ directory, add the new extension functions and
+   In the src/mapi/glapi/gen/ directory, add the new extension functions and
    enums to the gl_API.xml file.
    Then, a bunch of source files must be regenerated by executing the
    corresponding Python scripts.

docs/sourcetree.html

@@ -59,7 +59,6 @@ each directory.
         <li><b>osmesa</b> - off-screen software driver
         <li>XXX more
         </ul>
-    <li><b>es</b> - OpenGL ES overlay, parallelly buildable with the core Mesa
     <li><b>math</b> - vertex array translation and transformation code
         (not used with Gallium)
     <li><b>program</b> - Vertex/fragment shader and GLSL compiler code
@@ -135,7 +134,6 @@ each directory.
        <li><b>clover</b> - OpenCL state tracker
        <li><b>dri</b> - Meta state tracker for DRI drivers
        <li><b>egl</b> - Meta state tracker for EGL drivers
-       <li><b>es</b> - OpenGL ES 1.x and 2.x state trackers
        <li><b>glx</b> - Meta state tracker for GLX
        <li><b>vdpau</b> - VDPAU state tracker
        <li><b>vega</b> - OpenVG 1.x state tracker