Delete or update left-over ASSERT use and comments.

webrtc/base/unixfilesystem.h

Index: webrtc/base/unixfilesystem.h
diff --git a/webrtc/base/unixfilesystem.h b/webrtc/base/unixfilesystem.h
index e3710ec4827388602c8fabc3f9de2ea65f310267..d6dfed547b5fba664fb7e27bd2ab6309c76826d0 100644
--- a/webrtc/base/unixfilesystem.h
+++ b/webrtc/base/unixfilesystem.h
@@ -44,7 +44,7 @@ class UnixFilesystem : public FilesystemInterface {
   bool DeleteFile(const Pathname& filename) override;
 
   // This will attempt to delete the folder located at 'folder'
-  // It ASSERTs and returns false if you pass it a non-existant folder or a
+  // It DCHECKs and returns false if you pass it a non-existant folder or a
   // plain file.
   bool DeleteEmptyFolder(const Pathname& folder) override;