Fix misleadingly qualified static method calls

src/main/java/org/sablecc/sablecc/ComputeCGNomenclature.java

...n/java/org/sablecc/sablecc/ComputeSimpleTermPosition.java

...a/org/sablecc/sablecc/ConstructParserGenerationDatas.java

src/main/java/org/sablecc/sablecc/GenParser.java

...org/sablecc/sablecc/InternalTransformationsToGrammar.java

src/main/java/org/sablecc/sablecc/ResolveAstIds.java