Removed migrate tuples quick fix.
Removed "tuples not supported" diagnostic.
Removed tuples from type checker test.
Removed tuples from PSI tests.
Removed tuples from BuiltInsReferenceResolverTest.
Renamed test data dir.
Renamed tuples from other code.
Removed tuples from grammar.
Always parsing tuples as errors.
Removed tuples from node types
Removed JetTupleType.
Removed JetTupleExpression.
Code cleanup in BasicExpressionTypingVisitor: added 'statics', removed unused method.
Removed "worst code in Kotlin project".

Nothing changed after removing.
Removed usages of getTuple() and isTupleType()
Removed tuple-related methods from KotlinBuiltIns.
Removed Tuples.jet.
Renamed generator.
Replaced function with constant.
Renamed Tuple0 to Unit, removed aliasing.