Merge ~cjwatson/launchpad-layers:turnip-remove-resource-handling into launchpad-layers:main

[Colin Watson]

turnip-base: Remove resource handling

Now that `metadata.yaml` no longer declares a resource, it doesn't make sense to have code to handle it.

[Clinton Fung (clinton-fung)]

review: Needs Information

[Jürgen Gmach (jugmac00)]

review: Approve

[Clinton Fung (clinton-fung)]

review: Approve

diff --git a/turnip-base/lib/charms/turnip/base.py b/turnip-base/lib/charms/turnip/base.py
index cbb736f..06e5272 100644
--- a/turnip-base/lib/charms/turnip/base.py
+++ b/turnip-base/lib/charms/turnip/base.py
@@ -223,12 +223,7 @@ def install_payload():
                 **swift_creds,
             )
         else:
-            resource_path = hookenv.resource_get("turnip")
-            if resource_path and os.path.getsize(resource_path):
-                with open(resource_path, "rb") as resource:
-                    host.write_file(archive_path, resource.read(), perms=0o644)
-            else:
-                raise PayloadError("No build available, so cannot deploy code")
+            raise PayloadError("No build available, so cannot deploy code")
 
         # Unpack source
         target_dir = os.path.join(payloads_dir(), desired_build_label)