diff --git a/docs/source/_static/theme_overrides.css b/docs/source/_static/theme_overrides.css
index db92babc73e090e6fd1ee73203f6b74493522c83..7c1a5202231086af91e2bd4b388d8de4b064f27f 100644
--- a/docs/source/_static/theme_overrides.css
+++ b/docs/source/_static/theme_overrides.css
@@ -8,10 +8,3 @@
     max-width: 100%;
     overflow: visible;
 }
-
-/* rtd_theme currently colours code-blocks in the pygments style (ie. green).
- * This overrides this design choice with white. Note: future versions of the
- * sphinx_rtd_theme might not need this HACK. */
-.highlight {
-    background: #ffffff;
-}