feat: remove mock driver (#422)

The mock driver missed the mark a bit.  It's much more difficult to simulate other DB drivers that I anticipated with this implementation.  Removing until there's a more refined plan.

Author: cofin

docs/examples/patterns/mock_testing.py

@@ -76,7 +76,7 @@ Choose a topic
       :link: testing
       :link-type: doc
 
-      Unit test with mock adapters and integration test patterns.
+      Unit and integration test patterns.
 
    .. grid-item-card:: ETL & Data Pipelines
       :link: etl

docs/usage/index.rst

@@ -3,42 +3,6 @@ Testing
 
 SQLSpec provides tools for both unit and integration testing of database code.
 
-Mock Adapter for Unit Tests
----------------------------
-
-``MockSyncConfig`` and ``MockAsyncConfig`` use an in-memory SQLite backend with
-optional dialect transpilation. Write SQL in your production dialect (PostgreSQL,
-MySQL, Oracle) and it gets transpiled to SQLite before execution.
-
-.. literalinclude:: /examples/patterns/mock_testing.py
-   :language: python
-   :caption: ``mock adapter for unit tests``
-   :start-after: # start-example
-   :end-before: # end-example
-   :dedent: 4
-   :no-upgrade:
-
-Key features:
-
-- ``target_dialect`` accepts ``"postgres"``, ``"mysql"``, ``"oracle"``, or ``"sqlite"``
-- SQL is automatically transpiled to SQLite for execution
-- No external database required -- runs entirely in-memory
-- Supports ``initial_sql`` parameter for schema setup on connection create
-
-Integration Test Patterns
--------------------------
-
-For integration tests against real databases, use the standard ``SQLSpec`` +
-adapter config pattern with temporary databases.
-
-.. literalinclude:: /examples/patterns/integration_testing.py
-   :language: python
-   :caption: ``integration test fixtures``
-   :start-after: # start-example
-   :end-before: # end-example
-   :dedent: 4
-   :no-upgrade:
-
 Pytest Fixture Tips
 -------------------
 
@@ -64,6 +28,20 @@ Pytest Fixture Tips
             session.execute("create table users (id integer primary key, name text)")
             yield session
 
+Integration Test Patterns
+-------------------------
+
+For integration tests against real databases, use the standard ``SQLSpec`` +
+adapter config pattern with temporary databases.
+
+.. literalinclude:: /examples/patterns/integration_testing.py
+   :language: python
+   :caption: ``integration test fixtures``
+   :start-after: # start-example
+   :end-before: # end-example
+   :dedent: 4
+   :no-upgrade:
+
 Related Guides
 --------------
 

docs/usage/testing.rst

@@ -183,7 +183,6 @@ exclude = [
   "sqlspec/dialects/**/*.py",                 # Keep SQLGlot dialect subclasses interpreted
   "sqlspec/**/__init__.py",                   # Init files (usually just imports)
   "sqlspec/protocols.py",                     # Protocol definitions
-  "sqlspec/adapters/mock/**",                 # Mock adapter (testing only)
   "sqlspec/migrations/commands.py",           # Migration command CLI (dynamic imports)
   "sqlspec/data_dictionary/_loader.py",       # Loader relies on __file__ which fails in compiled modules
   "sqlspec/extensions/fastapi/providers.py",  # Uses SingletonMeta metaclass