boards: esp32c3: remove invalid adc1 entry.

Remove ADC2 support (identified as adc1 entry)
for additional ESP32-C3 based board targets.
Other boards have those instances already deleted.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

samples/drivers/adc/adc_dt/boards/esp32c3_devkitm.overlay

@@ -6,9 +6,7 @@
 
 / {
 	zephyr,user {
-		io-channels =
-			<&adc0 0>,
-			<&adc1 0>;
+		io-channels = <&adc0 0>;
 	};
 };
 
@@ -25,17 +23,3 @@
 		zephyr,resolution = <12>;
 	};
 };
-
-&adc1 {
-	status = "okay";
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	channel@0 {
-		reg = <0>;
-		zephyr,gain = "ADC_GAIN_1_4";
-		zephyr,reference = "ADC_REF_INTERNAL";
-		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
-		zephyr,resolution = <12>;
-	};
-};

samples/drivers/adc/adc_dt/boards/esp32c3_luatos_core.overlay

@@ -6,9 +6,7 @@
 
 / {
 	zephyr,user {
-		io-channels =
-			<&adc0 0>,
-			<&adc1 0>;
+		io-channels = <&adc0 0>;
 	};
 };
 
@@ -25,17 +23,3 @@
 		zephyr,resolution = <12>;
 	};
 };
-
-&adc1 {
-	status = "okay";
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	channel@0 {
-		reg = <0>;
-		zephyr,gain = "ADC_GAIN_1_4";
-		zephyr,reference = "ADC_REF_INTERNAL";
-		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
-		zephyr,resolution = <12>;
-	};
-};

samples/drivers/adc/adc_dt/boards/esp32c3_luatos_core_esp32c3_usb.overlay

@@ -6,9 +6,7 @@
 
 / {
 	zephyr,user {
-		io-channels =
-			<&adc0 0>,
-			<&adc1 0>;
+		io-channels = <&adc0 0>;
 	};
 };
 
@@ -25,17 +23,3 @@
 		zephyr,resolution = <12>;
 	};
 };
-
-&adc1 {
-	status = "okay";
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	channel@0 {
-		reg = <0>;
-		zephyr,gain = "ADC_GAIN_1_4";
-		zephyr,reference = "ADC_REF_INTERNAL";
-		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
-		zephyr,resolution = <12>;
-	};
-};