[GPCAPIM-427] Remove common repo dependency (#197)

<!-- markdownlint-disable-next-line first-line-heading -->
## Description

Removing common repo dependency, can add back in the future if we decide
that we have a good use-case for the common repo.

## Context

<!-- Why is this change required? What problem does it solve? -->

## Type of changes

<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply. -->

- [x] Refactoring (non-breaking change)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would change existing
functionality)
- [ ] Bug fix (non-breaking change which fixes an issue)

## Checklist

<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->

- [x] I have followed the code style of the project
- [ ] I have added tests to cover my changes
- [ ] I have updated the documentation accordingly
- [ ] This PR is a result of pair or mob programming
- [ ] Exceptions/Exclusions to coding standards (e.g. #noqa or #NOSONAR)
are included within this Pull Request.

---

## Sensitive Information Declaration

To ensure the utmost confidentiality and protect your and others
privacy, we kindly ask you to NOT including [PII (Personal Identifiable
Information) / PID (Personal Identifiable
Data)](https://digital.nhs.uk/data-and-information/keeping-data-safe-and-benefitting-the-public)
or any other sensitive data in this PR (Pull Request) and the codebase
changes. We will remove any PR that do contain any sensitive
information. We really appreciate your cooperation in this matter.

- [x] I confirm that neither PII/PID nor sensitive data are included in
this PR and the codebase changes.

Author: ian-robinson-35

README.md

@@ -116,10 +116,6 @@ The dev container sits on the same network, `gateway-local`, as [the `gateway-ap
 
 - A container runtime such as [Docker](https://docs.docker.com/engine/install/) (Linux/WSL) or [Colima](https://github.com/abiosoft/colima) (macOS)
 
-### External Dependencies
-
-This project depends on the [clinical-data-common](https://github.com/NHSDigital/clinical-data-common) library for shared utilities. It is declared as a Git dependency in `gateway-api/pyproject.toml` and installed automatically by Poetry.
-
 ## Usage
 
 The project uses `make` targets to build, deploy, and manage the application. Run these from the repository root:

gateway-api/README.md

@@ -114,31 +114,17 @@ gateway-api/
 Specified under `[tool.poetry.dependencies]` in `pyproject.toml`:
 
 | Package | Description |
-|---|---|
+| --- | --- |
 | `flask` | Web framework powering the Gateway API |
 | `requests` | HTTP client for calling PDS, SDS, and GP provider APIs |
 | `types-flask` | Type stubs for Flask (used by mypy) |
-| `clinical-data-common` | Shared NHSE library for common utilities ([GitHub repo](https://github.com/NHSDigital/clinical-data-common)) |
-
-The `clinical-data-common` dependency is pinned to a Git tag in `pyproject.toml`:
-
-```toml
-[tool.poetry.dependencies]
-clinical-data-common = { git = "https://github.com/NHSDigital/clinical-data-common.git", tag = "v0.1.0" }
-```
-
-To update it to a newer tag or version:
-
-```bash
-poetry update clinical-data-common
-```
 
 ### Dev Dependencies
 
 Specified under `[dependency-groups] dev` in `pyproject.toml`:
 
 | Package | Description |
-|---|---|
+| --- | --- |
 | `mypy` | Static type checker (strict mode enabled) |
 | `pytest` | Test runner |
 | `pytest-bdd` | BDD-style acceptance tests with Gherkin feature files |

gateway-api/poetry.lock

@@ -9,7 +9,6 @@ readme = "README.md"
 requires-python = ">=3.14,<4.0.0"
 
 [tool.poetry.dependencies]
-clinical-data-common = { git = "https://github.com/NHSDigital/clinical-data-common.git", tag = "v0.1.0" }
 flask = "^3.1.3"
 types-flask = "^1.1.6"
 requests = "^2.33.0"