[Python sdk] Remove test dependencies from Main Package Dependencies (#1463)

[Python sdk] Remove test dependencies from Main Package Dependencies

This PR updates the Python SDK package to minimize its dependency
footprint.

This pr removes the following packages from the main package
dependencies. These libraries are primarily used for testing purposes
and are not necessary for the sdk's functionality.

- `pytest`
- `pytest-asyncio`
- `mock`

Author: Ankush-lastmile

python/requirements.txt

@@ -9,16 +9,13 @@ google-generativeai>=0.3.1
 huggingface-hub >= 0.20.3
 hypothesis==6.91.0
 lastmile-utils==0.0.23
-mock
 nest_asyncio
 nltk
 openai >= 1.13.3
 prompt_toolkit
 pybars3
 pydantic>=2.1
 pylint
-pytest
-pytest-asyncio
 python-dotenv
 pyyaml
 requests