diff --git a/sessions/overview.mmd b/sessions/overview.mmd
deleted file mode 100644
index 1ff2cd3..0000000
--- a/sessions/overview.mmd
+++ /dev/null
@@ -1,67 +0,0 @@
-    digraph {
-        # Styling
-        graph [compound = true, nodesep = .1, ranksep = .1, rankdir = TB]
-        node [shape = rectangle, style = filled, fixedsize = true,
-              color = lightblue, fontsize = 14, width = 2.1]
-        edge [fontsize = 14]
-
-        # Nodes
-        mmash_dir [label = 'data-raw/mmash/']
-        mmash_dir_2 [label = 'data-raw/mmash/']
-        mmash_dir_3 [label = 'data-raw/mmash/']
-        mmash_r [label = 'data-raw/mmash.R']
-        mmash_r_2 [label = 'data-raw/mmash.R']
-        mmash_zip [label = 'data-raw/mmash-data.zip']
-        rmd [label = 'doc/learning.qmd']
-        rmd_2 [label = 'doc/learning.qmd']
-        html [label = 'doc/learning.html']
-        fn_r [label = 'R/functions.R']
-        fn_r_2 [label = 'R/functions.R']
-        make_fn [label = 'Create function']
-        mmash_rda [label = 'data/mmash.rda']
-        mmash_rda_2 [label = 'data/mmash.rda']
-
-        subgraph cluster1 {
-            graph [label = 'Download
-raw data', fontsize = 14]
-            color = black
-            penwidth = 1
-            mmash_r -> mmash_dir
-            mmash_r -> mmash_zip [arrowhead = none]
-            mmash_zip -> mmash_dir
-        }
-
-        subgraph cluster2 {
-            graph [label = 'Workflow
- ', fontsize = 14]
-            color = black
-            penwidth = 1
-            make_fn -> fn_r [label = '  cut & paste
-commit']
-            rmd -> make_fn [len = 2, label = '   ']
-            make_fn -> rmd [len = 2, label = '   ']
-            fn_r -> rmd [label = '   source']
-            mmash_dir_2 -> rmd [label = '   import']
-        }
-
-        subgraph cluster3 {
-            graph [label = 'Create
-project data', fontsize = 14]
-            color = black
-            penwidth = 1
-            mmash_dir_3 -> mmash_rda
-            fn_r_2 -> mmash_r_2 [label = '   source']
-            mmash_r_2 -> mmash_dir_3 [arrowhead = none]
-            mmash_r_2 -> mmash_rda
-        }
-
-        subgraph cluster4 {
-            graph [label = 'Work with
-project data', fontsize = 14]
-            color = black
-            penwidth = 1
-            mmash_rda_2 -> rmd_2 [label = '   import']
-            rmd_2 -> html [label = '   render']
-        }
-
-    }