update readme

Author: alamb

benchmarks/README.md

@@ -246,25 +246,8 @@ You can enable `mimalloc` or `snmalloc` (to use either the mimalloc or snmalloc
 cargo run --release --features "mimalloc" --bin tpch -- benchmark datafusion --iterations 3 --path ./data --format tbl --query 1 --batch-size 4096
 ```
 
-The benchmark program also supports CSV and Parquet input file formats and a utility is provided to convert from `tbl`
-(generated by the `dbgen` utility) to CSV and Parquet.
-
-```bash
-cargo run --release --bin tpch -- convert --input ./data --output /mnt/tpch-parquet --format parquet
-```
-
 Or if you want to verify and run all the queries in the benchmark, you can just run `cargo test`.
 
-#### Sorted Conversion
-
-The TPCH tables generated by the dbgen utility are sorted by their first column (their primary key for most tables, the `l_orderkey` column for the `lineitem` table.)
-
-To preserve this sorted order information during conversion (useful for benchmarking execution on pre-sorted data) include the `--sort` flag:
-
-```bash
-cargo run --release --bin tpch -- convert --input ./data --output /mnt/tpch-sorted-parquet --format parquet --sort
-```
-
 ### Comparing results between runs
 
 Any `dfbench` execution with `-o <dir>` argument will produce a