feat: delete integration_launch

[h-ohta]

PR Type

• Improvement

Related Links

TIER IV INTERNAL LINK

• https://star4.slack.com/archives/C4P0NSMB5/p1657593423027269
• https://tier4.atlassian.net/browse/T4PB-21125

Description

• delete integration_launch because this is no longer used.

Review Procedure

Remarks

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• Code follows coding guidelines
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• Commits are properly organized and messages are according to the guideline
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• (Optional) Unit tests have been written for new behavior
• PR title describes the changes

Post-Review Checklist for the PR Author

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• All open points are addressed and tracked via issues or tickets
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