doc: update deprecation info in repo_example docs

Rephrase deprecation info in repo_example modules doc headers
to reflect that the deprecation has happened.

Signed-off-by: Lukas Puehringer <[email protected]>

Author: lukpueh

examples/repo_example/basic_repo.py

@@ -1,13 +1,10 @@
 """
 A TUF repository example using the low-level TUF Metadata API.
 
-
-As 'repository_tool' and 'repository_lib' are being deprecated, repository
-metadata must be created and maintained *manually* using the low-level
-Metadata API. The example code in this file demonstrates how to
-implement similar functionality to that of the legacy 'repository_tool'
-and 'repository_lib' until a new repository implementation is available.
-
+The example code in this file demonstrates how to *manually* create and
+maintain repository metadata using the low-level Metadata API. It implements
+similar functionality to that of the deprecated legacy 'repository_tool' and
+'repository_lib'. (see ADR-0010 for details about repository library design)
 
 Contents:
  * creation of top-level metadata

examples/repo_example/hashed_bin_delegation.py

@@ -1,11 +1,10 @@
 """
 A TUF hash bin delegation example using the low-level TUF Metadata API.
 
-As 'repository_tool' and 'repository_lib' are being deprecated, hash bin
-delegation interfaces are no longer available in this implementation. The
-example code in this file demonstrates how to easily implement those
-interfaces, and how to use them together with the TUF metadata API, to perform
-hash bin delegation.
+The example code in this file demonstrates how to *manually* perform hash bin
+delegation using the low-level Metadata API. It implements similar
+functionality to that of the deprecated legacy 'repository_tool' and
+'repository_lib'. (see ADR-0010 for details about repository library design)
 
 Contents:
 - Re-usable hash bin delegation helpers