debug! instead of warn! on non-Python file in sourcedb

Summary: The event of when sourcedb detects a non-Python file is not interesting enough to warrant a warning message (we know it happens very often in 3p targets). Downgrade the message to debug level to avoid spamming console logs.

Reviewed By: samwgoldman

Differential Revision: D67177209

fbshipit-source-id: 2233eb2477932f8dba9107c93d10dc71c735b81e

pyre2/pyre2/bin/module/source_db.rs

@@ -13,7 +13,7 @@ use std::path::PathBuf;
 use anyhow::anyhow;
 use anyhow::Context as _;
 use starlark_map::small_map::SmallMap;
-use tracing::warn;
+use tracing::debug;
 use vec1::Vec1;
 
 use crate::error::style::ErrorStyle;
@@ -59,7 +59,8 @@ fn read_manifest_file_data(data: &[u8]) -> anyhow::Result<Vec<ManifestItem>> {
                 });
             }
             Err(error) => {
-                warn!("Cannot convert path to module name: {error:#}");
+                // This often happens for buckified 3rd-party targets
+                debug!("Cannot convert path to module name: {error:#}");
             }
         }
     }