Remove unused code

src/output/human_readable.rs

@@ -1,18 +0,0 @@
-/*pub(crate) fn display_variable_declaration<C>(context: &C, formatter: &mut std::fmt::Formatter,
-	variable_declaration: &std::rc::Rc<foliage::VariableDeclaration>)
-	-> std::fmt::Result
-where C:
-	crate::traits::VariableDeclarationDomain + crate::traits::VariableDeclarationID
-{
-	let id = context.variable_declaration_id(variable_declaration);
-	let domain = context.variable_declaration_domain(variable_declaration)
-		.expect("unspecified variable domain");
-
-	let prefix = match domain
-	{
-		crate::Domain::Integer => "N",
-		crate::Domain::Program => "X",
-	};
-
-	write!(formatter, "{}{}", prefix, id + 1)
-}*/