Remove unneeded precedence implementation

src/format/formulas.rs

@@ -1,34 +1,5 @@
 use super::*;
 
-impl super::Precedence for crate::Formula
-{
-	fn precedence_level(&self) -> i32
-	{
-		match &self
-		{
-			Self::Predicate(_)
-			| Self::Boolean(_)
-			| Self::Compare(_)
-				=> 0,
-			/*Self::And(formulas)
-			| Self::Or(formulas) if formulas.len() == 1
-				=> 0,*/
-			Self::Not(_)
-			| Self::Exists(_)
-			| Self::ForAll(_)
-				=> 1,
-			Self::And(_)
-				=> 2,
-			Self::Or(_)
-				=> 3,
-			Self::Implies(_)
-				=> 4,
-			Self::IfAndOnlyIf(_)
-				=> 5,
-		}
-	}
-}
-
 fn requires_parentheses<'formula>(formula: &'formula crate::Formula,
 	parent_formula: &'formula crate::Formula)
 	-> bool
@@ -148,7 +119,6 @@ impl<'formula> std::fmt::Debug for FormulaDisplay<'formula>
 {
 	fn fmt(&self, format: &mut std::fmt::Formatter) -> std::fmt::Result
 	{
-		let precedence_level = self.formula.precedence_level();
 		let requires_parentheses = match self.parent_formula
 		{
 			Some(ref parent_formula) => requires_parentheses(self.formula, parent_formula),