Fix/dependency and header

[Sushant-Chavan]

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Basic Info

Info	Please fill out this column
Ticket(s) this addresses	N/A
Primary OS tested on	Ubuntu
Robotic platform tested on	N/A
Does this PR contain AI generated software?	NO
Was this PR description generated by AI software?	NO

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Description of contribution in a few bullet points

• Added a missing dependency declaration on the benchmark pkg in the nav2_mppi_controller
• Removed an unused header included in the nav2_smac_planner pkg

Description of documentation updates required from your changes

N/A

Description of how this change was tested

N/A

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Future work that may be required in bullet points

N/A

For Maintainers:

• Check that any new parameters added are updated in docs.nav2.org
• Check that any significant change is added to the migration guide
• Check that any new features OR changes to existing behaviors are reflected in the tuning guide
• Check that any new functions have Doxygen added
• Check that any new features have test coverage
• Check that any new plugins is added to the plugins page
• If BT Node, Additionally: add to BT's XML index of nodes for groot, BT package's readme table, and BT library lists
• Should this be backported to current distributions? If so, tag with backport-*.

[mergify]

@Sushant-Chavan, your PR has failed to build. Please check CI outputs and resolve issues.
You may need to rebase or pull in main due to API changes (or your contribution genuinely fails).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
nav2_smac_planner/src/a_star.cpp	93.60% <ø> (ø)

... and 4 files with indirect coverage changes

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