[antlir] remove warning about resources not being executable

Summary:
There's little value in logging this, and users easily get confused thinking
it's an error.

Test Plan: testhard

Reviewed By: justintrudell

Differential Revision: D51166685

fbshipit-source-id: 0f9cd7642257833f9dcaed4d6003d8259d8cdc26

antlir/fs_utils.py

@@ -376,13 +376,11 @@ def resource(cls, package, name: str, *, exe: bool) -> Iterator["Path"]:
                 yield Path(rsrc_in.name).abspath()
                 return
 
-            # why does this happen? who knows but we can make a copy of
-            # the binary that _is_ executable
-            log.warning(
-                f"{package}.{name} doesn't exist or is not executable"
-            )  # pragma: no cover
             # The resource has no path, so we have to materialize it.
             #
+            # Why does this happen? Who knows - but we can make a copy of the
+            # binary that _is_ executable and antlir1 limps on another day.
+            #
             # This code path is not reached by our coverage harness,
             # since resources in '@mode/dev will always have a real
             # filesystem path.  However, we get all the needed signal