auditor: remove unused pyo3-build-config from tokmd-python 🧾 (#1350)

Removed unused `pyo3-build-config` from `tokmd-python` `Cargo.toml`.

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*PR created automatically by Jules for task
[14682462600309846384](https://jules.google.com/task/14682462600309846384)
started by @EffortlessSteven*

Author: EffortlessSteven

Cargo.lock

@@ -27,8 +27,6 @@ tokmd-envelope.workspace = true
 default = ["extension-module"]
 extension-module = ["pyo3/extension-module"]
 
-[build-dependencies]
-pyo3-build-config = "0.28.3"
 
 [dev-dependencies]
 tempfile.workspace = true