Pull PollingComponent up from individual display drivers to Display. (#5444)

esphome/components/ili9xxx/display.py

@@ -115,7 +115,6 @@ async def to_code(config):
     rhs = MODELS[config[CONF_MODEL]].new()
     var = cg.Pvariable(config[CONF_ID], rhs)
 
-    await cg.register_component(var, config)
     await display.register_display(var, config)
     await spi.register_spi_device(var, config)
     dc = await cg.gpio_pin_expression(config[CONF_DC_PIN])

esphome/components/ili9xxx/ili9xxx_display.h

@@ -19,8 +19,7 @@ enum ILI9XXXColorMode {
 #define ILI9XXXDisplay_DATA_RATE spi::DATA_RATE_40MHZ
 #endif  // ILI9XXXDisplay_DATA_RATE
 
-class ILI9XXXDisplay : public PollingComponent,
-                       public display::DisplayBuffer,
+class ILI9XXXDisplay : public display::DisplayBuffer,
                        public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW,
                                              spi::CLOCK_PHASE_LEADING, ILI9XXXDisplay_DATA_RATE> {
  public: