Throw out old unit tests

Considering we never run or update them, they're not providing any value right now.
Kept the chapter recognition tests and bumped to JUnit 5.

(cherry picked from commit 4d23f35b9d)

# Conflicts:
#	app/src/test/java/eu/kanade/tachiyomi/CustomRobolectricGradleTestRunner.kt

app/src/main/java/eu/kanade/domain/DomainModule.kt

@@ -25,12 +25,14 @@ import uy.kohesive.injekt.api.get
 class DomainModule : InjektModule {
 
     override fun InjektRegistrar.registerInjectables() {
+        addFactory { GetNextChapterForManga(get()) }
+
         addSingletonFactory<HistoryRepository> { HistoryRepositoryImpl(get()) }
         addFactory { DeleteHistoryTable(get()) }
         addFactory { GetHistory(get()) }
-        addFactory { GetNextChapterForManga(get()) }
         addFactory { RemoveHistoryById(get()) }
         addFactory { RemoveHistoryByMangaId(get()) }
+
         addSingletonFactory<SourceRepository> { SourceRepositoryImpl(get()) }
         addFactory { GetEnabledSources(get(), get()) }
         addFactory { DisableSource(get()) }