chore: remove unused reference to THIRD_PARTY_NOTICES from "nightly"

[tswast]

Note: "nightly" build mostly just needed from API coverage now.

Hopefully fixes failing "nightly" on main.
🦕

[tswast]

>           raise self._exception
 
more_vert |   |   |   |   |   | E           google.api_core.exceptions.NotFound: 404 Not found: Dataset bigframes-dev:bigframes_testing was not found in location asia-northeast1
 
more_vert |   |   |   |   |   | E
 
more_vert |   |   |   |   |   | E           Location: asia-northeast1
 
more_vert |   |   |   |   |   | E           Job ID: 59cc54bd-164d-4df0-bda7-f65d073be012
 
more_vert |   |   |   |   |   | E            Share your usecase with the BigQuery DataFrames team at the https://bit.ly/bigframes-feedback survey.
 
more_vert |   |   |   |   |  

<br class="Apple-interchange-newline">>           raise self._exception
E           google.api_core.exceptions.NotFound: 404 Not found: Dataset bigframes-dev:bigframes_testing was not found in location asia-northeast1
E           
E           Location: asia-northeast1
E           Job ID: 59cc54bd-164d-4df0-bda7-f65d073be012
E            Share your usecase with the BigQuery DataFrames team at the [https://bit.ly/bigframes-feedback](https://www.google.com/url?sa=D&q=https%3A%2F%2F2.zoppoz.workers.dev%3A443%2Fhttps%2Fbit.ly%2Fbigframes-feedback) survey.

>           raise self._exception
 
more_vert |   |   |   |   |   | E           google.api_core.exceptions.NotFound: 404 Not found: Dataset bigframes-dev:bigframes_testing was not found in location asia-northeast1
 
more_vert |   |   |   |   |   | E
 
more_vert |   |   |   |   |   | E           Location: asia-northeast1
 
more_vert |   |   |   |   |   | E           Job ID: 59cc54bd-164d-4df0-bda7-f65d073be012
 
more_vert |   |   |   |   |   | E            Share your usecase with the BigQuery DataFrames team at the https://bit.ly/bigframes-feedback survey.
 
more_vert |   |   |   |   |  

<br class="Apple-interchange-newline">>           raise self._exception
E           google.api_core.exceptions.NotFound: 404 Not found: Dataset bigframes-dev:bigframes_testing was not found in location asia-northeast1
E           
E           Location: asia-northeast1
E           Job ID: 59cc54bd-164d-4df0-bda7-f65d073be012
E            Share your usecase with the BigQuery DataFrames team at the [https://bit.ly/bigframes-feedback](https://www.google.com/url?sa=D&q=https%3A%2F%2F2.zoppoz.workers.dev%3A443%2Fhttps%2Fbit.ly%2Fbigframes-feedback) survey.

Looks like maybe we have some flakiness with a global session object picking up the location from a different test.