fix: remove EventSemaphore.clear()

[joe-chacko]

• I have considered the risk of behavior change or other zero migration impact (https://github.com/OpenLiberty/open-liberty/wiki/Behavior-Changes).
• If this PR fixes an Issue, the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN" (verify release bug label if applicable: https://github.com/OpenLiberty/open-liberty/wiki/Open-Liberty-Conventions).
• If this PR resolves an external Known Issue (including APARS), the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN".

[joe-chacko]

#build
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Code analysis and actions

DO NOT DELETE THIS COMMENT.

• 8 product code files were changed.

• Please describe in a separate comment how you tested your changes.

• 1 infrastructure code files were changed.

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