delete unnecessary imports

alib2algo/src/arbology/exact/ExactNonlinearTreePatternAutomaton.cpp

@@ -14,7 +14,6 @@
 #include "ExactSubtreeRepeatsNaive.h"
 #include <deque>
-#include <alphabet/LabeledSymbol.h>
 #include <alphabet/RankedSymbol.h>
 namespace arbology {

alib2algo/src/grammar/convert/ToAutomatonBottomUp.cpp

@@ -7,7 +7,6 @@
 #include "ToAutomatonBottomUp.h"
 #include <alphabet/BottomOfTheStackSymbol.h>
-#include <alphabet/LabeledSymbol.h>
 #include <label/InitialStateLabel.h>
 #include <label/FinalStateLabel.h>

alib2algo/src/grammar/simplify/ToCNF.cpp

@@ -9,7 +9,6 @@
 #include "EpsilonRemover.h"
 #include "SimpleRulesRemover.h"
-#include "alphabet/LabeledSymbol.h"
 #include "alphabet/SymbolPairSymbol.h"
 #include <exception/CommonException.h>
 #include <common/createUnique.hpp>

alib2algo/src/grammar/simplify/ToGNF.cpp

@@ -11,7 +11,6 @@
 #include "SimpleRulesRemover.h"
 #include "LeftRecursionRemover.h"
 #include "../convert/ToGrammarRightRG.h"
-#include "alphabet/LabeledSymbol.h"
 #include "alphabet/SymbolPairSymbol.h"
 #include <common/createUnique.hpp>

alib2algo/src/regexp/convert/ToGrammarRightRGGlushkov.cpp

@@ -9,7 +9,6 @@
 #include <algorithm>
-#include <alphabet/LabeledSymbol.h>
 #include <alphabet/InitialSymbol.h>
 #include <label/LabelPairLabel.h>

alib2algo/src/tree/generate/RandomTreeFactory.cpp

@@ -22,7 +22,6 @@
 #include <alphabet/NonlinearVariableSymbol.h>
 #include <exception/CommonException.h>
 #include <alphabet/RankedSymbol.h>
-#include <alphabet/LabeledSymbol.h>
 namespace tree {