[custom] Remove platforms (#8119)

esphome/components/custom_component/__init__.py

@@ -1,31 +1,7 @@
-import esphome.codegen as cg
 import esphome.config_validation as cv
-from esphome.const import CONF_COMPONENTS, CONF_ID, CONF_LAMBDA
-
-custom_component_ns = cg.esphome_ns.namespace("custom_component")
-CustomComponentConstructor = custom_component_ns.class_("CustomComponentConstructor")
 
 MULTI_CONF = True
-CONFIG_SCHEMA = cv.Schema(
-    {
-        cv.GenerateID(): cv.declare_id(CustomComponentConstructor),
-        cv.Required(CONF_LAMBDA): cv.returning_lambda,
-        cv.Optional(CONF_COMPONENTS): cv.ensure_list(
-            cv.Schema({cv.GenerateID(): cv.declare_id(cg.Component)}).extend(
-                cv.COMPONENT_SCHEMA
-            )
-        ),
-    }
+
+CONFIG_SCHEMA = cv.invalid(
+    'The "custom" component has been removed. Consider conversion to an external component.\nhttps://esphome.io/guides/contributing#a-note-about-custom-components'
 )
-
-
-async def to_code(config):
-    template_ = await cg.process_lambda(
-        config[CONF_LAMBDA], [], return_type=cg.std_vector.template(cg.ComponentPtr)
-    )
-
-    rhs = CustomComponentConstructor(template_)
-    var = cg.variable(config[CONF_ID], rhs)
-    for i, conf in enumerate(config.get(CONF_COMPONENTS, [])):
-        comp = cg.Pvariable(conf[CONF_ID], var.get_component(i))
-        await cg.register_component(comp, conf)

esphome/components/custom_component/custom_component.h

@@ -1,28 +0,0 @@
-#pragma once
-
-#include "esphome/core/component.h"
-#include "esphome/core/application.h"
-
-#include <vector>
-
-namespace esphome {
-namespace custom_component {
-
-class CustomComponentConstructor {
- public:
-  CustomComponentConstructor(const std::function<std::vector<Component *>()> &init) {
-    this->components_ = init();
-
-    for (auto *comp : this->components_) {
-      App.register_component(comp);
-    }
-  }
-
-  Component *get_component(int i) const { return this->components_[i]; }
-
- protected:
-  std::vector<Component *> components_;
-};
-
-}  // namespace custom_component
-}  // namespace esphome