LGTM has been acquired by Github, and all its features is replaced by Github Code Scanning. So seems .lgtm.yml is no longer used.
@@ -1,7 +0,0 @@
-extraction:
- cpp:
- after_prepare:
- - pip3 install scons
- - PATH="/opt/work/.local/bin:$PATH"
- index:
- build_command: scons -j2