Clean-up

src/parse/error.rs

@@ -28,7 +28,6 @@ pub enum Kind
 	UnexpectedToken,
 	EmptyInput,
 	ExpectedLogicalConnectiveArgument(String),
-	ExpectedComparisonArgument(String),
 	MultipleComparisonOperators(crate::ComparisonOperator, crate::ComparisonOperator),
 }
 
@@ -102,12 +101,6 @@ impl Error
 		Self::new(Kind::ExpectedLogicalConnectiveArgument(logical_connective_name), location)
 	}
 
-	pub(crate) fn new_comparison_argument(comparison_operator_name: String, location: Location)
-		-> Self
-	{
-		Self::new(Kind::ExpectedComparisonArgument(comparison_operator_name), location)
-	}
-
 	pub(crate) fn new_multiple_comparison_operators(
 		comparison_operator_1: crate::ComparisonOperator,
 		comparison_operator_2: crate::ComparisonOperator, location: Location)
@@ -147,9 +140,6 @@ impl std::fmt::Debug for Error
 			Kind::ExpectedLogicalConnectiveArgument(ref logical_connective_name) =>
 				write!(formatter, "this “{}” logical connective is missing an argument",
 					logical_connective_name)?,
-			Kind::ExpectedComparisonArgument(ref comparison_operator_name) =>
-				write!(formatter, "this “{}” comparison is missing an argument",
-					comparison_operator_name)?,
 			Kind::MultipleComparisonOperators(comparison_operator_1, comparison_operator_2) =>
 				write!(formatter, "chained comparisons aren’t supported (found “{:?}” and “{:?}” in the same formula), consider separating them with “and”",
 					comparison_operator_1, comparison_operator_2)?,