diff --git a/MANIFEST.in b/MANIFEST.in
index fe346e1f9ab8b..7abd1b6c48cbb 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -27,7 +27,6 @@ exclude .git-blame-ignore-revs
 exclude .mailmap
 exclude .pre-commit-config.yaml
 exclude azure-pipelines.yml
-exclude lgtm.yml
 exclude CODE_OF_CONDUCT.md
 exclude CONTRIBUTING.md
 exclude SECURITY.md
diff --git a/build_tools/generate_authors_table.py b/build_tools/generate_authors_table.py
index dfeb1b92e954f..02ec6d2713b80 100644
--- a/build_tools/generate_authors_table.py
+++ b/build_tools/generate_authors_table.py
@@ -75,7 +75,7 @@ def get_contributors():
     # add missing contributors without GitHub accounts
     members |= {"Angel Soler Gollonet"}
     # remove CI bots
-    members -= {"sklearn-ci", "sklearn-lgtm", "sklearn-wheels"}
+    members -= {"sklearn-ci", "sklearn-wheels"}
     contributor_experience_team -= (
         core_devs  # remove ogrisel from contributor_experience_team
     )
diff --git a/lgtm.yml b/lgtm.yml
deleted file mode 100644
index 2dfdba3d160cc..0000000000000
--- a/lgtm.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-extraction:
-  cpp:
-    before_index:
-      - pip3 install numpy==1.17.3
-      - pip3 install --no-deps scipy Cython
-    index:
-      build_command:
-        - python3 setup.py build_ext -i