doc: Remove BGP deprecated doc (#477)

Doc: Remove BGP deprecated doc

docs/advanced_usages/custom-tests.md

@@ -283,10 +283,6 @@ In addition to the required `AntaTest.anta_tests` decorator, ANTA offers a set o
 
 - `anta.decorators.deprecated_test`: Use this to log a message of WARNING severity when a test is deprecated.
 - `anta.decorators.skip_on_platforms`: Use this to skip tests for functionalities that are not supported on specific platforms.
-- `anta.decorators.check_bgp_family_enable`: Use this to skip tests when a particular BGP address family is not configured on the device.
-
-!!! warning
-    The `check_bgp_family_enable` decorator is deprecated and will eventually be removed in a future major release of ANTA. For more details, please refer to the [BGP tests section](../api/tests.routing.bgp.md).
 
 ```python
 from anta.decorators import skip_on_platforms

docs/api/tests.routing.bgp.md

@@ -6,40 +6,6 @@
 
 # ANTA catalog for BGP tests
 
-!!! warning "Deprecation Notice"
-    As part of our ongoing effort to improve the ANTA catalog and align it with best practices, we are announcing the deprecation of certain BGP tests along with a specific decorator. These will be removed in a future major release of ANTA.
-
-_What is being deprecated?_
-
-- __Tests__: The following BGP tests in the ANTA catalog are marked for deprecation.
-
-```yaml
-anta.tests.routing:
-  bgp:
-    - VerifyBGPIPv4UnicastState:
-    - VerifyBGPIPv4UnicastCount:
-    - VerifyBGPIPv6UnicastState:
-    - VerifyBGPEVPNState:
-    - VerifyBGPEVPNCount:
-    - VerifyBGPRTCState:
-    - VerifyBGPRTCCount:
-```
-
-- __Decorator__: The `check_bgp_family_enable` decorator is also being deprecated as it is no longer needed with the new refactored BGP tests.
-
-_What should you do?_
-
-We strongly recommend transitioning to the new set of BGP tests that have been introduced to replace the deprecated ones. Please refer to each test documentation on this page below.
-
-```yaml
-anta.tests.routing:
-  bgp:
-    - VerifyBGPPeerCount:
-    - VerifyBGPPeersHealth:
-    - VerifyBGPSpecificPeers:
-```
-___
-
 ::: anta.tests.routing.bgp
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