fix double import of suffix automaton

[JJCUBER]

Summary

SuffixAutomaton.h gets imported once after SuffixArray.h and again at the end:

\kactlimport{SuffixArray.h}
\kactlimport{SuffixAutomaton.h} % !
\kactlimport{SuffixTree.h}
\kactlimport{Hashing.h}
\kactlimport{HashInterval.h}
\kactlimport{AhoCorasick.h}
\kactlimport{LyndonFactorization.h}
\kactlimport{SuffixAutomaton.h} % !

Checklist

• AC on at least 1 problem (N/A)
• Using tabs for indentation
• Longest line at most 63 characters (with tab length 2)