diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index af35054..2a21467 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,11 +8,6 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
-  # Keep the requirements.txt for Sphinx builds in `/docs` up to date, also.
-  - package-ecosystem: "pip"
-    directory: "/docs"
-    schedule:
-      interval: "daily"
   # For keeping workflows up-to-date.
   - package-ecosystem: "github-actions"
     directory: "/"
diff --git a/docs/requirements.txt b/docs/requirements.txt
deleted file mode 100644
index db831ac..0000000
--- a/docs/requirements.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-# Requirements file for the GitHub ammaraskar/sphinx-action, which builds Sphinx
-# documentation
-
-sphinx-autobuild >= 2024.10.3
-sphinx-autodoc2 >= 0.5.0, < 1.0
-sphinx-book-theme >= 1.1.3, < 2.0
-sphinx-copybutton >= 0.5.2, < 1.0
-myst-parser [linkify] >= 4.0.0, < 5.0