Revert "fix(export): GPT models w/ bias=False convert properly"
<!-- pylint-output-strict-mode-false -->

beep boop 🤖: 🙏 The following files have warnings. In case you are familiar with these, please try helping us to improve the code base.

---

Your code was analyzed with PyLint. The following annotations have been identified:

```
************* Module nemo.export.trt_llm.tensorrt_llm_build
nemo/export/trt_llm/tensorrt_llm_build.py:31:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/export/trt_llm/tensorrt_llm_build.py:19:0: W0611: Unused Builder imported from tensorrt_llm.builder (unused-import)
nemo/export/trt_llm/tensorrt_llm_build.py:23:0: W0611: Unused add_lora imported from tensorrt_llm.models.modeling_utils (unused-import)

-----------------------------------
Your code has been rated at 9.32/10
```

---

Thank you for improving NeMo's documentation! [🤖]: Hi @terrykong 👋,

We wanted to let you know that a [CICD pipeline](https://github.com/NVIDIA/NeMo/actions/runs/11863365040) for this PR just finished successfully

So it might be time to merge this PR or get some approvals

I'm just a bot so I'll leave it you what to do next.

//cc @pablo-garay @ko3n1g
Reverts NVIDIA/NeMo#11255

This PR broke other models and was unnecessarily fixing gptnext when I should have just used llama