[select] Use a user provided default constructor

esphome/components/number/number.h

@@ -28,7 +28,7 @@ class Number;
  */
 class Number : public EntityBase {
  public:
-  float state{};
+  float state;
 
   void publish_state(float state);
 

esphome/components/select/select.h

@@ -30,7 +30,8 @@ class Select : public EntityBase {
  public:
   SelectTraits traits;
 
-  Select() = default;
+  // User provided, not "= default": `new(p) Select()` would zero-fill .bss that is already zero.
+  Select() {}
   ~Select() = default;
 
   void publish_state(const std::string &state) { this->publish_state(state.c_str()); }

esphome/components/template/number/template_number.cpp

@@ -3,8 +3,6 @@
 
 namespace esphome::template_ {
 
-TemplateNumber::TemplateNumber() {}
-
 static const char *const TAG = "template.number";
 
 void TemplateNumber::setup() {

esphome/components/template/number/template_number.h

@@ -10,9 +10,6 @@ namespace esphome::template_ {
 
 class TemplateNumber final : public number::Number, public PollingComponent {
  public:
-  // User provided, not "= default": `new(p) TemplateNumber()` would zero-fill .bss that is already zero.
-  // Defined out of line so the member constructors are not inlined into every construction site.
-  TemplateNumber();
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
   void setup() override;