remove unused SuffixTries

Author: mtf90

CHANGELOG.md

@@ -32,6 +32,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 * Removed the (package-private) classes `net.automatalib.util.automata.predicates.{AcceptanceStatePredicate,OutputSatisfies,TransitionPropertySatisfies}`.
 * Removed `net.automatalib.graphs.IndefiniteLTS.java`. By naming, this class should denote a `TransitionSystem` and not a `Graph` structure. However, since `TransitionSystem`s are inherently labeled, this class serves no more real purpose. To re-establish the previous functionality, simply implement `Graph` and `EdgeLabels`.
+* Removed (unused) `SuffixTrie` class without replacement.
 
 
 ## [0.10.0](https://github.com/LearnLib/automatalib/releases/tag/automatalib-0.10.0) - 2020-10-11