docs: Update installation instructions

Change-Id: Id3639b4ac1110d2f770e89aa9f24d716f49d7b6d
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 8bdfd9f..153ffed 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -30,7 +30,7 @@
     'sphinx.ext.mathjax',
     'sphinxcontrib.doxylink',
     'sphinxcontrib.aafig',
-    'sphinxcontrib.googleanalytics',
+    # 'sphinxcontrib.googleanalytics',
     'sphinxcontrib.bibtex',
     'redmine_issue'
 ]