Minor: Remove parquet build script

[tustvold]

Which issue does this PR close?

Closes #.

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

[jimexist]

wonder why was there a build script in the first place?

[tustvold]

Potentially this wasn't always possible, I'm not sure when concat was added

[alamb]

I double checked that all references to these environment variables have been changed too

https://github.com/search?q=repo%3Aapache%2Farrow-rs+PARQUET_VERSION&type=code

https://github.com/search?q=repo%3Aapache%2Farrow-rs%20PARQUET_CREATED_BY&type=code

[ursabot]

Benchmark runs are scheduled for baseline = 74b174c and contender = f6bd9b5. f6bd9b5 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java