diff --git a/Source/SwiftLintCore/Extensions/SwiftSyntax+SwiftLint.swift b/Source/SwiftLintCore/Extensions/SwiftSyntax+SwiftLint.swift
index 7fa40385d..fd9b4ae34 100644
--- a/Source/SwiftLintCore/Extensions/SwiftSyntax+SwiftLint.swift
+++ b/Source/SwiftLintCore/Extensions/SwiftSyntax+SwiftLint.swift
@@ -147,10 +147,6 @@ public extension ModifierListSyntax? {
         }
     }
 
-    var isFinal: Bool {
-        contains(tokenKind: .keyword(.final))
-    }
-
     private func contains(tokenKind: TokenKind) -> Bool {
         guard let modifiers = self else {
             return false
@@ -347,12 +343,6 @@ public extension IdentifierExprSyntax {
     }
 }
 
-public extension MemberAccessExprSyntax {
-    var isSelfAccess: Bool {
-        base?.as(IdentifierExprSyntax.self)?.isSelf == true
-    }
-}
-
 public extension ClosureCaptureItemSyntax {
     var capturesSelf: Bool {
         expression.as(IdentifierExprSyntax.self)?.isSelf == true
diff --git a/Source/SwiftLintCore/Helpers/Stack.swift b/Source/SwiftLintCore/Helpers/Stack.swift
index 0f1d1a69b..2d6eab3e9 100644
--- a/Source/SwiftLintCore/Helpers/Stack.swift
+++ b/Source/SwiftLintCore/Helpers/Stack.swift
@@ -5,11 +5,6 @@ public struct Stack<Element> {
     /// Creates an empty `Stack`.
     public init() {}
 
-    /// True if the stack has no elements. False otherwise.
-    public var isEmpty: Bool {
-        elements.isEmpty
-    }
-
     /// The number of elements in this stack.
     public var count: Int {
         elements.count