diff --git a/.readthedocs.yml b/.readthedocs.yml
deleted file mode 100644
index f3ef19490ae..00000000000
--- a/.readthedocs.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: 2
-
-mkdocs:
-  configuration: mkdocs.yml
-
-python:
-  version: 3.7
-  install:
-    - requirements: legacy-docs/requirements.txt
diff --git a/legacy-docs/requirements.txt b/legacy-docs/requirements.txt
deleted file mode 100644
index 95c4004965b..00000000000
--- a/legacy-docs/requirements.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Pygments==2.3.1
-setuptools==41.0.1
-docutils==0.14
-mock==1.0.1
-pillow==5.4.1
-alabaster>=0.7,<0.8,!=0.7.5
-commonmark==0.8.1
-recommonmark==0.5.0
-mkdocs>1.0.0
diff --git a/mkdocs.yml b/mkdocs.yml
deleted file mode 100644
index 89bcfeeca92..00000000000
--- a/mkdocs.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-# N.B.!! This is the config for the legacy readthedocs site.
-# All of the docs pages have been removed from the source, and Page Redirects
-# have been setup in the RTD admin console. This means that all rubocop.readthedocs.io
-# links should be redirected to their corresponding docs page at docs.rubocop.org.
-site_name: "RuboCop: The Ruby Linter that Serves and Protects"
-repo_url: https://github.com/rubocop-hq/rubocop
-edit_uri: edit/master/legacy-docs/
-copyright: "Copyright &copy; 2012-2020 Bozhidar Batsov and RuboCop contributors"
-docs_dir: legacy-docs
-theme: readthedocs
diff --git a/readthedocs.yml b/readthedocs.yml
deleted file mode 100644
index f67868ad9c5..00000000000
--- a/readthedocs.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-build:
-    image: stable
-
-formats:
-    - htmlzip