DCOSP-29004 outdate version info (#86)

* DCOSP-29004 outdate version info

* Review feedback

Author: Dave Cuthbert

source/includes/fact-platform-support.rst

@@ -89,12 +89,6 @@
     - |checkmark|
     -
 
-  * - Ubuntu 14.04
-    - |checkmark|
-    -
-    -
-    -
-
   * - Windows 8 and later
     - |checkmark|
     -

source/installation/installation-linux.txt

@@ -40,7 +40,7 @@ platforms on the ``x86_64`` architecture:
 - Debian 10, 9, and 8
 - RHEL / CentOS 8, 7, and 6
 - SUSE 12
-- Ubuntu 20.04, 18.04, 16.04, and 14.04
+- Ubuntu 20.04, 18.04, and 16.04
 
 In addition, the {+dbtools-short+} also support select Linux platforms
 on the ``arm64``, ``ppc64le``, and ``s390x`` architectures.  See