chore(yaaredis): remove yaaredis support (#12226)

With `ddtrace>=3.0` the implementation details of the yaaredis
integration is internal to the tracer. We can remove this integration
without introducing a breaking change.

## Checklist
- [x] PR author has checked that all the criteria below are met
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- The PR description articulates the motivation for the change
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strategy
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- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
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[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
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implications of this PR as reported in the benchmarks PR comment
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[release branch maintenance
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Author: mabdinur

.riot/requirements/1761702.txt

@@ -93,7 +93,6 @@
     "pyodbc": True,
     "fastapi": True,
     "dogpile_cache": True,
-    "yaaredis": True,
     "asyncpg": True,
     "aws_lambda": True,  # patch only in AWS Lambda environments
     "azure_functions": True,

.riot/requirements/1cc7b0e.txt

@@ -182,8 +182,6 @@ contacting support.
 +--------------------------------------------------+---------------+----------------+
 | :ref:`wsgi`                                      | \*            | No             |
 +--------------------------------------------------+---------------+----------------+
-| :ref:`yaaredis`                                  | >= 2.0.0      | Yes            |
-+--------------------------------------------------+---------------+----------------+
 
 
 .. [1] Libraries that are automatically instrumented when the

.riot/requirements/1f1e9b4.txt

@@ -505,12 +505,6 @@ Vertica
 ^^^^^^^
 .. automodule:: ddtrace.contrib._vertica
 
-.. _yaaredis:
-
-yaaredis
-^^^^^^^^
-.. automodule:: ddtrace.contrib._yaaredis
-
 .. _wsgi:
 
 WSGI