adapted dev.html

Author: elsdvlee

spec/dev.html

@@ -116,8 +116,6 @@
 
 <section data-include="section/fields.md" data-include-format="markdown"></section>
 
-<section data-include="section/referenceFormulation.md" data-include-format="markdown"></section>
-
 <section data-include="section/joins.md" data-include-format="markdown"></section>
 
 <section data-include="section/annotations.md" data-include-format="markdown"></section>