From 8691843f14e6a82aec9bc50e90caaf5ea75e4c84 Mon Sep 17 00:00:00 2001
From: Alec Edgington <54802828+cqc-alec@users.noreply.github.com>
Date: Thu, 17 Feb 2022 06:19:18 +0000
Subject: [PATCH] [api-change] Remove `Backend.characterisation` (#226)

---
 pytket/docs/changelog.rst         |  2 ++
 pytket/pytket/backends/backend.py | 13 -------------
 2 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/pytket/docs/changelog.rst b/pytket/docs/changelog.rst
index 6ca95cade0..b3708290c4 100644
--- a/pytket/docs/changelog.rst
+++ b/pytket/docs/changelog.rst
@@ -11,6 +11,8 @@ API changes:
 * The deprecated ``Backend.compile_circuit`` method is removed. (Use
   ``get_compiled_circuit`` instead.)
 * ``RebaseCustom`` takes one allowed gateset parameter rather than separate single qubit and multiqubit gatesets.
+* The ``Backend.characterisation`` property is removed. (Use
+  ``Backend.backend_info`` instead.)
 
 Minor new features:
 
diff --git a/pytket/pytket/backends/backend.py b/pytket/pytket/backends/backend.py
index 2639ee461e..cdff8095a3 100644
--- a/pytket/pytket/backends/backend.py
+++ b/pytket/pytket/backends/backend.py
@@ -406,19 +406,6 @@ def cancel(self, handle: ResultHandle) -> None:
         """
         raise NotImplementedError("Backend does not support job cancellation.")
 
-    @property
-    def characterisation(self) -> Optional[dict]:
-        """Retrieve the characterisation targeted by the backend if it exists.
-
-        :return: The characterisation that this backend targets if it exists. The
-            characterisation object contains device-specific information such as gate
-            error rates.
-        :rtype: Optional[dict]
-        """
-        raise NotImplementedError(
-            "Backend does not support retrieving characterisation."
-        )
-
     @property
     def backend_info(self) -> Optional[BackendInfo]:
         """Retrieve all Backend properties in a BackendInfo object, including