Revert of include Package proto into Result proto

recipe_engine/package.py

Index: recipe_engine/package.py
diff --git a/recipe_engine/package.py b/recipe_engine/package.py
index e8d491a5022e2f6f6edde4c0074ec088f8bbcf29..e376beb8a35b1501643a485b71807383f7a5ba41 100644
--- a/recipe_engine/package.py
+++ b/recipe_engine/package.py
@@ -280,7 +280,6 @@
   """A RepoSpec implementation that uses a local filesystem path."""
 
   def __init__(self, project_id, path):
-    assert os.path.isabs(path), path
     self.project_id = project_id
     self.path = path
 
@@ -612,7 +611,7 @@
                    them.
       overrides: if not None, a dictionary of project overrides. Dictionary keys
                  are the `project_id` field to override, and dictionary values
-                 are the absolute override path.
+                 are the override path.
     """
     context = PackageContext.from_package_file(
       repo_root, package_file, allow_fetch, deps_path=deps_path)