mediatek: filogic: asus,rt-ax57m: remove unused pinctrl groups

Remove unused pinctrl groups defined in the device tree, probably as a
result of importing the vendor device tree which is based on the
reference board from MediaTek's SDK.

114b5c2063 ("mediatek: filogic: Add support ASUS RT-AX57M")
Signed-off-by: Daniel Golle <[email protected]>
(cherry picked from commit 96205c99d01cf7f5e69f03ccdea790d0eb9ddb36)
Signed-off-by: Garrett Mesmer <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/21237
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/mediatek/dts/mt7981b-asus-rt-ax57m.dts

@@ -246,41 +246,6 @@
 };
 
 &pio {
-	i2c_pins: i2c-pins-g0 {
-		mux {
-			function = "i2c";
-			groups = "i2c0_0";
-		};
-	};
-
-	pcm_pins: pcm-pins-g0 {
-		mux {
-			function = "pcm";
-			groups = "pcm";
-		};
-	};
-
-	pwm0_pin: pwm0-pin-g0 {
-		mux {
-			function = "pwm";
-			groups = "pwm0_0";
-		};
-	};
-
-	pwm1_pin: pwm1-pin-g1 {
-		mux {
-			function = "pwm";
-			groups = "pwm1_1";
-		};
-	};
-
-	pwm2_pin: pwm2-pin {
-		mux {
-			function = "pwm";
-			groups = "pwm2";
-		};
-	};
-
 	spi0_flash_pins: spi0-pins {
 		mux {
 			function = "spi";
@@ -299,27 +264,6 @@
 			bias-pull-down = <MTK_PUPD_SET_R1R0_11>;
 		};
 	};
-
-	spic_pins: spi1-pins {
-		mux {
-			function = "spi";
-			groups = "spi1_1";
-		};
-	};
-
-	uart1_pins: uart1-pins-g1 {
-		mux {
-			function = "uart";
-			groups = "uart1_1";
-		};
-	};
-
-	uart2_pins: uart2-pins-g1 {
-		mux {
-			function = "uart";
-			groups = "uart2_1";
-		};
-	};
 };
 
 &watchdog {