cleaning

examples/PieChartView.swift

examples/examples.db

examples/examples_template.db

src/alignment/common/JavaWithoutContext.java

src/alignment/common/MappingOutput.java

src/alignment/common/SwiftListenerWithoutContext.java

src/alignment/ruleinfer/IterativeMapping.java

src/alignment/ruleinfer/IterativeMapping_for_method.java

src/alignment/ruleinfer/QueryExamplesTest.java

src/alignment/ruleinfer/StructureMappingAntlr4_for_stmt.java

src/alignment/ruleinfer/TemplateWalk.java