Fix the static pages

`/minari`, `/gerrit-dashboard-generator`, and `/symbolon` was treated as generatable pages,
despite being configured in `STATIC_PATHS`.

content/pages/other.rst

@@ -0,0 +1,10 @@
+Some pages i made
+#################
+
+:date: 2019-11-13T16:06Z
+
+There are some pages i made for friends.
+
+- `Calendar of the Minari <{static}../minari/index.html>`_
+- `Gerrit Dashboard Generator <{static}../gerrit-dashboard-generator/index.html>`_
+- `Symbolon <{static}../symbolon/index.html>`_

pelicanconf.py

@@ -16,7 +16,6 @@ STATIC_PATHS = [
     'pgpkey',
     'minari',
     'symbolon',
-    'symbolon/index.html',
     'gergely@polonkai.eu.asc',
 ]