[bug] Remove deprecated code for unsupported data types

[ShreyaR]

Describe the bug
Executing some guardrails code results in the following deprecation warning. Since we're beyond 0.3.x, we should remove the deprecated code (and switch the warning over).

guardrails/datatypes.py:170
  /Users/shreyarajpal/guardrails/guardrails/datatypes.py:170: DeprecationWarning: The 'Email' type  is deprecated and will be removed in versions 0.3.0 and beyond. Use the pydantic 'str' primitive instead.
    warnings.warn(

guardrails/datatypes.py:170
  /Users/shreyarajpal/guardrails/guardrails/datatypes.py:170: DeprecationWarning: The 'URL' type  is deprecated and will be removed in versions 0.3.0 and beyond. Use the pydantic 'str' primitive instead.
    warnings.warn(

guardrails/datatypes.py:170
  /Users/shreyarajpal/guardrails/guardrails/datatypes.py:170: DeprecationWarning: The 'PythonCode' type  is deprecated and will be removed in versions 0.3.0 and beyond. Use the pydantic 'str' primitive instead.
    warnings.warn(

guardrails/datatypes.py:170
  /Users/shreyarajpal/guardrails/guardrails/datatypes.py:170: DeprecationWarning: The 'SQLCode' type  is deprecated and will be removed in versions 0.3.0 and beyond. Use the pydantic 'str' primitive instead.
    warnings.warn(

To Reproduce
Run pytest tests/unit_tests/validators/test_two_words.py

Library version:
Latest main, commit hash 5d653b9

[github-actions]

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[aaravnavani]

closing with #605