ARM: dts: stm32: remove gpio aliases for stm32mp157c

GPIO aliases are not used by stm32 pinctrl driver.
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c.dtsi

@@ -35,20 +35,6 @@ psci {
 		cpu_on = <0x84000003>;
 	};
 
-	aliases {
-		gpio0 = &gpioa;
-		gpio1 = &gpiob;
-		gpio2 = &gpioc;
-		gpio3 = &gpiod;
-		gpio4 = &gpioe;
-		gpio5 = &gpiof;
-		gpio6 = &gpiog;
-		gpio7 = &gpioh;
-		gpio8 = &gpioi;
-		gpio9 = &gpioj;
-		gpio10 = &gpiok;
-	};
-
 	intc: interrupt-controller@a0021000 {
 		compatible = "arm,cortex-a7-gic";
 		#interrupt-cells = <3>;