Fixed some virtual / override problems

In some cases, virtual and override were used simultaneously
In other cases, destructors were virtual in non-base classes.

Grbl_Esp32/src/Spindles/10vSpindle.h

@@ -55,7 +55,7 @@ namespace Spindles {
         // Name of the configurable. Must match the name registered in the cpp file.
         const char* name() const override { return "10V"; }
 
-        virtual ~_10v() {}
+        ~_10v() {}
 
     protected:
         void set_enable(bool enable_pin);

Grbl_Esp32/src/Spindles/BESCSpindle.h

@@ -63,7 +63,7 @@ namespace Spindles {
         void init() override;
         void config_message() override;
 
-        virtual void set_output(uint32_t duty) override;
+        void set_output(uint32_t duty) override;
 
         // Configuration handlers:
         void validate() const override { PWM::validate(); }
@@ -80,6 +80,6 @@ namespace Spindles {
         // Name of the configurable. Must match the name registered in the cpp file.
         const char* name() const override { return "BESC"; }
 
-        virtual ~BESC() {}
+        ~BESC() {}
     };
 }

Grbl_Esp32/src/Spindles/DacSpindle.h

@@ -49,7 +49,7 @@ namespace Spindles {
         // Name of the configurable. Must match the name registered in the cpp file.
         const char* name() const override { return "DAC"; }
 
-        virtual ~Dac() {}
+        ~Dac() {}
 
     private:
         bool _gpio_ok;  // DAC is on a valid pin

Grbl_Esp32/src/Spindles/Laser.h

@@ -52,6 +52,6 @@ namespace Spindles {
             PWM::group(handler);
         }
 
-        virtual ~Laser() {}
+        ~Laser() {}
     };
 }

Grbl_Esp32/src/Spindles/NullSpindle.h

@@ -47,6 +47,6 @@ namespace Spindles {
         // Name of the configurable. Must match the name registered in the cpp file.
         const char* name() const override { return "NoSpindle"; }
 
-        virtual ~Null() {}
+        ~Null() {}
     };
 }

Grbl_Esp32/src/Spindles/OnOffSpindle.h

@@ -36,9 +36,9 @@ namespace Spindles {
 
         void init() override;
 
-        virtual void setSpeedfromISR(uint32_t dev_speed) override;
-        void         setState(SpindleState state, SpindleSpeed speed) override;
-        void         config_message() override;
+        void setSpeedfromISR(uint32_t dev_speed) override;
+        void setState(SpindleState state, SpindleSpeed speed) override;
+        void config_message() override;
 
         // Methods introduced by this base clase
         virtual void set_direction(bool Clockwise);

Grbl_Esp32/src/Spindles/PWMSpindle.h

@@ -40,10 +40,10 @@ namespace Spindles {
         PWM& operator=(const PWM&) = delete;
         PWM& operator=(PWM&&) = delete;
 
-        void         init() override;
-        virtual void setSpeedfromISR(uint32_t dev_speed) override;
-        void         setState(SpindleState state, SpindleSpeed speed) override;
-        void         config_message() override;
+        void init() override;
+        void setSpeedfromISR(uint32_t dev_speed) override;
+        void setState(SpindleState state, SpindleSpeed speed) override;
+        void config_message() override;
         // Configuration handlers:
         void validate() const override { Spindle::validate(); }
 
@@ -67,7 +67,7 @@ namespace Spindles {
         // Configurable
         uint32_t _pwm_freq = 5000;
 
-        virtual void set_output(uint32_t duty) override;
+        void         set_output(uint32_t duty) override;
         virtual void deinit();
 
         virtual void get_pins_and_settings();

Grbl_Esp32/src/Spindles/RelaySpindle.h

@@ -34,7 +34,7 @@ namespace Spindles {
         Relay& operator=(const Relay&) = delete;
         Relay& operator=(Relay&&) = delete;
 
-        virtual ~Relay() {}
+        ~Relay() {}
 
         // Configuration handlers:
 

Grbl_Esp32/src/Spindles/Spindle.h

@@ -98,7 +98,7 @@ namespace Spindles {
             // TODO: Validate spinup/spindown delay?
         }
 
-        virtual void afterParse() override;
+        void afterParse() override;
 
         void group(Configuration::HandlerBase& handler) override {
             handler.item("spinup_ms", _spinup_ms);