chore(test): delete unused testdata and redundant comment lines

[hyperfinitism]

Changes

• Delete unused testdata pcr10s-serialized.dat
• Remove redundant comment lines in testdata.rs

[gemini-code-assist]

Code Review

This pull request removes documentation comments from the parses_builtin_tcb_policy test in tests/testdata.rs. The reviewer recommends retaining these comments as they provide critical context regarding the test's design and explain why a dynamic line count is used instead of a hardcoded assertion, which helps prevent future maintenance issues.

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tests/testdata.rs (30-33)

The removed comments provide valuable context regarding the design of this test. Specifically, explaining that the rule count 'has wandered across kernel versions' justifies why the test uses a dynamic line count rather than a hardcoded assertion. Removing this information makes the test's rationale less transparent for future maintainers who might otherwise attempt to 'simplify' the test with a fragile fixed count.