Site: Cleanup some out-of-date information

Remove references to Firefox. Remove link to a four year old roadmap.
Fix the placeholder mailing-list link to point at our project.

Change-Id: Iaacb8e077dd9316fc305f255a456133ce0fae25d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/491451
Reviewed-by: Heather Miller <hcm@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/site/_index.html b/site/_index.html
index ed532b8..b154b65 100644
--- a/site/_index.html
+++ b/site/_index.html
@@ -9,7 +9,9 @@
 	<a class="btn btn-lg btn-primary mr-3 mb-4" href="{{< relref "/docs" >}}">
 		Learn More <i class="fas fa-arrow-alt-circle-right ml-2"></i>
 	</a>
-	<p class="h3 mt-5">Skia is an open source 2D graphics library which provides common APIs that work across a variety of hardware and software platforms. It serves as the graphics engine for Google Chrome and Chrome OS, Android, Flutter, Mozilla Firefox and Firefox OS, and many other products.
+	<p class="h3 mt-5">Skia is an open source 2D graphics library which provides common APIs that
+		work across a variety of hardware and software platforms. It serves as the graphics engine
+		for Google Chrome and Chrome OS, Android, Flutter, and many other products.
 	</p>
 </div>
 {{< /blocks/cover >}}
diff --git a/site/about/_index.html b/site/about/_index.html
index f5b1ab1..69b50b2 100644
--- a/site/about/_index.html
+++ b/site/about/_index.html
@@ -11,23 +11,16 @@
   <p class="h3 mt-5">
     Skia is an open source 2D graphics library which provides common APIs that
     work across a variety of hardware and software platforms. It serves as the
-    graphics engine for Google Chrome and Chrome OS, Android, Flutter, Mozilla
-    Firefox and Firefox OS, and many other products. Skia is sponsored and managed
-    by Google, but is available for use by anyone under the BSD Free Software
-    License. While engineering of the core components is done by the Skia
-    development team, we consider contributions from any source.
+    graphics engine for Google Chrome and Chrome OS, Android, Flutter, and many
+    other products. Skia is sponsored and managed by Google, but is available
+    for use by anyone under the BSD Free Software License. While engineering of
+    the core components is done by the Skia development team, we consider
+    contributions from any source.
   </p>
 {{< /blocks/cover>}}
 
 {{< blocks/section color="primary">}}
 
-  {{< blocks/feature icon="fa-lightbulb" title="Roadmap" url="https://docs.google.com/document/d/1LSdO3I-IdZVZCtEnW9pu3k_32gfPIcB_YeSn-OJBGZI/edit?usp=sharing" >}}
-     <p class=h4>
-      Check out the high level themes we have on tap the next 6-12 months. Note it is a living
-      document that changes based on the requirements of our users.
-    </p>
-  {{< /blocks/feature >}}
-
   {{< blocks/feature icon="fa-lightbulb" title="Supported Platforms" >}}
   <p class=h4>
     Windows 7, 8, 8.1, 10<br>
@@ -41,7 +34,7 @@
 
 
   {{< blocks/feature icon="fas fa-envelope-square" title="Subscribe"
-      url="https://twitter.com/docsydocs" >}}
+      url="https://groups.google.com/forum/#!forum/skia-discuss" >}}
    <p class=h4>
       Join the mailing list to keep up to date.
    </p>
diff --git a/site/docs/_index.md b/site/docs/_index.md
index cdbda33..d898fc8 100644
--- a/site/docs/_index.md
+++ b/site/docs/_index.md
@@ -68,14 +68,6 @@
   </tr>
 </table>
 
-## Roadmap
-
-For a look at high level themes we have on tap the next 6-12 months, view our
-roadmap
-[here](https://docs.google.com/document/d/1LSdO3I-IdZVZCtEnW9pu3k_32gfPIcB_YeSn-OJBGZI/edit?usp=sharing).
-Note it is a living document that changes based on the requirements of our
-users.
-
 ## Platforms
 
 - Windows 7, 8, 8.1, 10