fix: Remove definition of SOURCE_PATH_SIZE (fixes #154).

[sitaowang1998]

Description

Remove definition of SOURCE_PATH_SIZE in CMakeLists.txt so a definition of the same macro in a parent project would not trigger a redefinition of the macro.

Checklist

• The PR satisfies the contribution guidelines.
• This is a breaking change and that has been indicated in the PR title, OR this isn't a
  breaking change.
• Necessary docs have been updated, OR no docs need to be updated.

Validation performed

• GitHub workflows pass.
• Unit tests pass in dev container
• Integration tests pass in dev container

Summary by CodeRabbit

• Chores
  • Removed a compile-time definition related to source directory path length. No impact on visible features or functionality.

[coderabbitai]

Walkthrough

The change removes the calculation and definition of the SOURCE_PATH_SIZE macro from the build configuration in CMakeLists.txt. This macro was previously used to determine the length of the absolute source directory path for compile-time usage. No other build settings or exported entities were affected.

Changes

File(s)	Change Summary
CMakeLists.txt	Removed calculation and definition of the SOURCE_PATH_SIZE macro.

Possibly related PRs

• build: Change CMAKE_SOURCE_DIR to PROJECT_SOURCE_DIR #45: Modifies how SOURCE_PATH_SIZE is computed by switching from CMAKE_SOURCE_DIR to PROJECT_SOURCE_DIR, indicating both PRs affect the same macro and related build logic.

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📒 Files selected for processing (1)

• CMakeLists.txt (0 hunks)

💤 Files with no reviewable changes (1)

• CMakeLists.txt

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• GitHub Check: non-storage-unit-tests (ubuntu-24.04)
• GitHub Check: non-storage-unit-tests (ubuntu-22.04)
• GitHub Check: lint

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