Remove parquet_filter and parquet sort benchmarks

[alamb]

Which issue does this PR close?

• Part of Add a datafusion benchmark for filter_pushdown #16729

Rationale for this change

These benchmarks are not used, and are done against synthetic data, and do not seem to measure the impact of filter pushdown or sort in a meaningful way. See additional rationale here:

• Add a datafusion benchmark for filter_pushdown #16729

1. To test filter pushdown we use the clickbench queries
2. To test sorting we use the sort_tpch benchmark

Also the name parquet as the benchmark is misleading as it is supposed to be for parquet filter pushdown

For example of this test adding #16711 (comment)

Let's remove these benchmarks and make a new one using the clickbench queries and data

What changes are included in this PR?

1. remove two unused benchmarks

Are these changes tested?

By CI and I tested that bench.sh still works

Are there any user-facing changes?

No (as I don't think these were ever used)

[xudong963]

🧹

[alamb]

Thank you for the review @xudong963