Remove unused tests and add asserts for not implemented parts in code generation.

quick fix on christian's rational

change so that ubuntu will stop yelling

be more specific with rational declaration for Windows sake

rational in namespace correction for windows

libsolidity/analysis/TypeChecker.cpp

@@ -774,6 +774,7 @@ bool TypeChecker::visit(VariableDeclarationStatement const& _statement)
 			solAssert(!var.typeName(), "");
 			var.annotation().type = valueComponentType->mobileType();
 			if (!var.annotation().type)
+			{
 				if (valueComponentType->category() == Type::Category::RationalNumber)
 					fatalTypeError(
 						_statement.initialValue()->location(),
@@ -783,6 +784,7 @@ bool TypeChecker::visit(VariableDeclarationStatement const& _statement)
 					);
 				else
 					solAssert(false, "");
+			}
 			var.accept(*this);
 		}
 		else