Remove slf4j-simple dependency

[gwttk]

Removed slf4j-simple dependency from pom.xml.
Libraries should only have a dependency on slf4j-api and not on slf4j-simple or any other specific logging binding (like logback-classic or log4j-core). This allows the application that uses your library to choose its own logging implementation, which is the main purpose of the SLF4J facade.

[gemini-code-assist]

Summary of Changes

Hello @gwttk, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the project's dependency management by removing the slf4j-simple binding. By retaining only the slf4j-api dependency, the library now provides greater flexibility, enabling applications that utilize it to integrate their preferred logging framework without encountering conflicts or forced implementations.

Highlights

• Dependency Removal: The slf4j-simple dependency has been removed from the pom.xml file.
• Best Practice Adherence: This change aligns with the best practice for libraries, which should only depend on slf4j-api to allow consuming applications to choose their own logging implementation.

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[gemini-code-assist]

Code Review

This pull request correctly removes the slf4j-simple dependency, which is a best practice for Java libraries to avoid forcing a specific logging implementation on consumers. This allows applications using this SDK to choose their own logging backend. I've included a suggestion to add a logging implementation back but scoped for tests, which will help with debugging during development.