Move old samples files to new init plug-in (#595)

This removes the old Ant samples and garage samples from the
`docsrc/samples` subfolder of the default DITA-OT distribution package.

Follow-up to dita-ot/org.dita.init#2, which will
allow them to be restored as necessary from the
[org.dita.init](dita-ot/org.dita.init#2) plugin
via the new `init` subcommand:

```shell
dita init samples
```

parameters/dita-command-arguments.dita

@@ -431,8 +431,8 @@
             example, use <parmname>--repeat</parmname>=<option>5</option>. The duration of each execution will appear in
             the console when the final transformation is complete.
             <codeblock outputclass="syntax-bash multi-platform">$ <cmdname>dita</cmdname> <parmname
-              >--input</parmname>=<filepath>docsrc/samples/sequence.ditamap</filepath> <parmname
-              >--format</parmname>=<option>html5</option> \
+              >--input</parmname>=<filepath>path/to/sample.ditamap</filepath> <parmname>--format</parmname>=<option
+              >html5</option> \
        <parmname>--repeat</parmname>=<option>5</option>
 1 11281ms
 2 4132ms

resources/conref-task.dita

@@ -20,6 +20,7 @@
           <dd><filepath id="ot-dir"><varname>dita-ot-dir</varname></filepath></dd>
           <dd><filepath id="dita-cmd"><cmdname>dita</cmdname></filepath></dd>
           <dd><filepath id="docsrc-dir"><varname>dita-ot-dir</varname>/docsrc</filepath></dd>
+          <dd><filepath id="docsrc-absolute"><varname>/absolute/path/to/dita-ot-dir</varname>/docsrc</filepath></dd>
           <dd><filepath id="samples-dir"><varname>dita-ot-dir</varname>/docsrc/samples</filepath></dd>
           <dd><filepath id="samples-absolute"><varname
               >/absolute/path/to/dita-ot-dir</varname>/docsrc/samples</filepath></dd>
@@ -112,11 +113,6 @@
               </parml></li>
           </ul>
         </info>
-        <stepresult id="running-ditaot-results">
-          <p>If processing is successful, nothing is printed in the terminal window. The built output is written to the
-            specified output directory (by default, in the <filepath>out</filepath> subdirectory of the current
-            directory).</p>
-        </stepresult>
       </step>
       <step>
         <cmd>Extending pre-processing</cmd>