diff --git a/hugo/assets/_custom.scss b/hugo/assets/_custom.scss
deleted file mode 100644
index 6016df00..00000000
--- a/hugo/assets/_custom.scss
+++ /dev/null
@@ -1,119 +0,0 @@
-.book-page {
-  background-color: white;
-}
-
-.highlight {
-  background-color: white;
-}
-
-html body h1 {
-  font-family: Tahoma, sans-serif;
-  font-style: normal;
-  font-weight: normal;
-  margin-top: 0em;
-  margin-bottom: 0.5em;
-  color: coral;
-}
-
-html body h2 {
-  font-family: Tahoma, sans-serif;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 150%;
-  margin-top: 0.5em !important;
-  margin-bottom: 0.5em !important;
-  color: royalblue;
-}
-
-html body h3 {
-  font-family: Tahoma, sans-serif;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 130%;
-  color: green;
-}
-
-html body h4 {
-  font-family: Tahoma, sans-serif;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 110%;
-  color: green;
-}
-
-html body dl {
-  font-family: Consolas, monospace;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 1rem;
-  color: black;
-  background-color: #e7e7e7 !important;
-}
-
-html body dl dt code {
-  font-family: Consolas, monospace;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 1rem;
-  color: black;
-  background-color: #e7e7e7 !important;
-  border-style: none
-}
-
-html body dl dd {
-  font-family: Tahoma, sans-serif;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 1rem;
-  color: black;
-  background-color: #e7e7e7 !important;
-}
-
-code{
-  font-family: Consolas, monospace;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 1rem;
-  color: black;
-  background-color: #e7e7e7 !important;
-    border: 0 none !important;
-}
-
-pre,
-pre code {
-  font-family: Consolas, monospace;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 1rem;
-  color: black;
-  background-color: #e7e7e7 !important;
-  border: none !important;
-}
-
-.markdown pre code {
-  line-height: 1.5 !important;
-}
-
-.markdown pre {
-  padding-top: 0.3rem !important;
-  padding-bottom: 0.3rem !important;
-}
-
-html body hr {
-    height: 2px !important;
-    background-color: midnightblue !important;
-    border: none !important;
-    margin-top: 1px !important;
-    margin-bottom: 1px !important;
-}
-
-html body p {
-  font-family: Tahoma, sans-serif;
-  font-style: normal;
-  font-weight: normal;
-  font-size: 110%;
-  color: black;
-  background-color: white !important;
-}
-
-
diff --git a/hugo/themes/etl_theme b/hugo/themes/etl_theme
deleted file mode 160000
index 751bde09..00000000
--- a/hugo/themes/etl_theme
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 751bde097bc9288666305bdb10c73e491fc43a72
diff --git a/hugo3/themes/hextra b/hugo3/themes/hextra
deleted file mode 160000
index 339a2ceb..00000000
--- a/hugo3/themes/hextra
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 339a2cebbe7e6a323c9509ca14e4470d00883fa2