drop not needed (Un)RankedTreeWrapper class

alib2data/src/tree/RankedTreeBase.h

alib2data/src/tree/RankedTreeWrapper.h

alib2data/src/tree/TreeFeatures.h

alib2data/src/tree/UnrankedTreeBase.h

alib2data/src/tree/UnrankedTreeWrapper.h

alib2data/src/tree/ranked/PostfixRankedTree.cpp

alib2data/src/tree/ranked/PostfixRankedTree.h

...2data/src/tree/ranked/PrefixRankedBarNonlinearPattern.cpp

alib2data/src/tree/ranked/PrefixRankedBarNonlinearPattern.h

alib2data/src/tree/ranked/PrefixRankedBarPattern.cpp

alib2data/src/tree/ranked/PrefixRankedBarPattern.h

alib2data/src/tree/ranked/PrefixRankedBarTree.cpp

alib2data/src/tree/ranked/PrefixRankedBarTree.h

alib2data/src/tree/ranked/PrefixRankedNonlinearPattern.cpp

alib2data/src/tree/ranked/PrefixRankedNonlinearPattern.h

alib2data/src/tree/ranked/PrefixRankedPattern.cpp

alib2data/src/tree/ranked/PrefixRankedPattern.h

alib2data/src/tree/ranked/PrefixRankedTree.cpp

alib2data/src/tree/ranked/PrefixRankedTree.h

alib2data/src/tree/ranked/RankedNonlinearPattern.cpp