Remove unused `PATH_TO_PPC_PROJECT` compile definition (#463) #2945

Job	Run time
lint / clang-format	11s
lint / python-lint	7s
mac / macos-clang-build	2m 35s
mac / macos-clang-build-debug	2m 5s
windows / windows-msvc-build-debug	6m 25s
windows / windows-msvc-build	2m 25s
ubuntu / ubuntu-gcc-build (ubuntu-24.04)	1m 19s
ubuntu / ubuntu-gcc-build-debug (ubuntu-24.04)	1m 3s
ubuntu / ubuntu-gcc-build (ubuntu-24.04-arm)	3m 18s
windows / windows-clang-build	8m 44s
ubuntu / ubuntu-clang-build (ubuntu-24.04-arm)	1m 46s
ubuntu / ubuntu-clang-build (ubuntu-24.04)	1m 12s
mac / macos-clang-test	2m 53s
ubuntu / ubuntu-gcc-test (ubuntu-24.04)	4m 28s
ubuntu / ubuntu-gcc-test (ubuntu-24.04-arm)	5m 35s
mac / macos-clang-test-extended	3m 8s
windows / windows-msvc-test	2m 28s
ubuntu / ubuntu-clang-test (ubuntu-24.04)	4m 51s
ubuntu / ubuntu-clang-test (ubuntu-24.04-arm)	6m 4s
ubuntu / ubuntu-clang-sanitizer-build (ubuntu-24.04)	1m 25s
windows / windows-msvc-test-extended	1m 28s
windows / windows-clang-test	1m 27s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04)	2m 41s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04-arm)	3m 36s
windows / windows-clang-test-extended	1m 34s
ubuntu / ubuntu-clang-sanitizer-test (ubuntu-24.04)	3m 9s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04-arm)	4m 22s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04)	3m 6s
ubuntu / ubuntu-clang-sanitizer-test-extended (ubuntu-24.04)	1m 42s
ubuntu / ubuntu-gcc-build-codecov	3m 55s
perf / ubuntu-gcc-build-perf-stats	1m 31s
	1h 30m 33s

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