Replace libdparse in UnusedResultChecker #288

Job	Run time
Run all tests (dmd-latest, dmd, ubuntu-22.04, make)	2m 40s
Run all tests (dmd-latest, dmd, ubuntu-22.04, dub, min libdparse)	1m 50s
Run all tests (dmd-latest, dmd, macos-latest, make)	4m 11s
Run all tests (dmd-latest, dmd, macos-latest, dub, min libdparse)	2m 27s
Run all tests (dmd-latest, dmd, windows-latest, make)	4m 17s
Run all tests (dmd-latest, dmd, windows-latest, dub, min libdparse)	3m 21s
Run all tests (ldc-latest, ldmd2, ubuntu-22.04, make)	3m 19s
Run all tests (ldc-latest, ldmd2, ubuntu-22.04, dub, min libdparse)	1m 58s
Run all tests (ldc-latest, ldmd2, macos-latest, make)	5m 39s
Run all tests (ldc-latest, ldmd2, macos-latest, dub, min libdparse)	3m 36s
Run all tests (ldc-latest, ldmd2, windows-latest, make)	8m 2s
Run all tests (ldc-latest, ldmd2, windows-latest, dub, min libdparse)	3m 48s
Run all tests (dmd-latest, gdc-12, ubuntu-22.04, make)	2m 36s
	47m 44s

Provide feedback