Replace empty destructors with = default for compiler optimization (#8189)

* Initial plan

* Replace empty destructors with = default

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

src/ast/simplifiers/bv_bounds_simplifier.cpp

@@ -25,8 +25,7 @@ public:
         updt_params(p);
     }
     
-    ~dom_bv_bounds_simplifier() override {
-    }
+    ~dom_bv_bounds_simplifier() override = default;
     
     void updt_params(params_ref const & p) override {
         m_propagate_eq = p.get_bool("propagate_eq", false);

src/ast/simplifiers/dependent_expr_state.h

@@ -66,7 +66,7 @@ class dependent_expr_state {
     };
 public:
     dependent_expr_state(ast_manager& m) : m_frozen_trail(m) {}
-    virtual ~dependent_expr_state() {}
+    virtual ~dependent_expr_state() = default;
     unsigned qhead() const { return m_qhead; }
     virtual unsigned qtail() const = 0;
     virtual dependent_expr const& operator[](unsigned i) = 0;
@@ -227,7 +227,7 @@ protected:
     proof* tr(proof* a, proof* b) { return m.mk_transitivity(a, b); }
 public:
     dependent_expr_simplifier(ast_manager& m, dependent_expr_state& s) : m(m), m_fmls(s), m_trail(s.m_trail) {}
-    virtual ~dependent_expr_simplifier() {}
+    virtual ~dependent_expr_simplifier() = default;
     virtual char const* name() const = 0;
     virtual void push() { }
     virtual void pop(unsigned n) { }

src/ast/simplifiers/euf_completion.cpp

@@ -140,9 +140,6 @@ namespace euf {
 
     }
 
-    completion::~completion() {
-    }
-
     bool completion::should_stop() {
         return
             !m.inc() ||

src/ast/simplifiers/euf_completion.h

@@ -226,7 +226,7 @@ namespace euf {
         bool is_gt(expr* a, expr* b) const;
     public:
         completion(ast_manager& m, dependent_expr_state& fmls);
-        ~completion() override;
+        ~completion() override = default;
         char const* name() const override { return "euf-completion"; }
         void push() override;
         void pop(unsigned n) override;

src/ast/simplifiers/extract_eqs.h

@@ -40,7 +40,7 @@ namespace euf {
 
     class extract_eq {
     public:
-        virtual ~extract_eq() {}
+        virtual ~extract_eq() = default;
         virtual void get_eqs(dependent_expr const& e, dep_eq_vector& eqs) = 0;
         virtual void pre_process(dependent_expr_state& fmls) {}
         virtual void updt_params(params_ref const& p) {}