[verible] Delete experimental verible style lint script
[verible] Delete experimental verible style lint script

Verible has now been integrated with Fusesoc and dvsim.

Use those tools to run Verible on the OpenTitan codebase as described in
the readme under `hw/lint/doc`.

Signed-off-by: Michael Schaffner <a005a2d3342a687ea2d05360c953107acbe83e08@google.com>

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