fix(data): merge 29 confirmed laptop near-duplicate records

Each removed record was a byte-identical re-import of a device that already
exists under a different Ammok row-id slug (Pattern 1: same scrape imported
twice). Within each group the two files differed only in `slug` and
`variant.source_row`; every real spec field (name, brand, cpu, release_date,
device_category, cpu_name, gpu_name, gpu_type, ram_gb, storage_gb, display,
weight_g, os) plus `source_urls` matched exactly, so the merge kept the file
with the lower `source_row` and dropped the redundant one. `source_urls`
were identical, so the union is a no-op and no field values were altered or
invented.

Configuration variants (same model, different CPU/RAM/storage) were left
untouched -- those are distinct real SKUs, not duplicates.

29 groups across acer(1), dell(13), hp(3), lenovo(8), msi(2), toshiba(2).
1995 -> 1966 laptop records.

Author: Seungpyo1007