Revert "Add Caddyfile for local testing"

Don't need it anymore since Lighthouse is run in CI

This reverts commit 8335d68450.

Caddyfile

@@ -1,17 +0,0 @@
-:1313 {
-    tls off
-    header / {
-        # Security related changes stolen from https://github.com/searx/searx-docker/blob/master/Caddyfile
-        Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
-        X-XSS-Protection "1; mode=block"
-        X-Content-Type-Options "nosniff"
-        X-Frame-Options "SAMEORIGIN"
-        Feature-Policy "accelerometer 'none';ambient-light-sensor 'none'; autoplay 'none';camera 'none';encrypted-media 'none'; geolocation 'none';gyroscope 'none';magnetometer 'none';microphone 'none';midi 'none';payment 'none';picture-in-picture 'none'; speaker 'none';sync-xhr 'none';usb 'none';vr 'none'"
-        Referrer-Policy "no-referrer"
-    }
-    gzip
-    root public
-    header / {
-        Cache-Control "max-age=2592000"
-    }
-}