Revert "Pull sipeed#39"

This reverts commit af816ce.

src/gpio.rs

@@ -236,14 +236,6 @@ pub struct Spi;
 /// I2C pin mode (type state)
 pub struct I2c;
 
-/// ADC analog pin mode (type state)
-pub struct Adc;
-
-/// PWM mode (type state)
-pub struct Pwm<MODE> {
-    _mode: PhantomData<MODE>,
-}
-
 #[doc(hidden)]
 pub trait UartPin<SIG> {}
 
@@ -354,24 +346,6 @@ macro_rules! impl_glb {
                     self.into_pin_with_mode(11, false, true, true)
                 }
 
-                // Do pull-up/pull-down/hi-z actually do anything for PWM?
-
-                /// Configures the pin to operate as a pull-down PWM pin.
-                pub fn into_pull_down_pwm(self) -> $Pini<Pwm<PullDown>> {
-                    // `bl602_pac::glb::gpio_cfgctln::REG_GPIO_n_FUNC_SEL_A::PWM_CHn`
-                    self.into_pin_with_mode(8, false, true, true)
-                }
-
-                /// Configures the pin to operate as a pull-up PWM pin.
-                pub fn into_pull_up_pwm(self) -> $Pini<Pwm<PullUp>> {
-                    self.into_pin_with_mode(8, false, true, true)
-                }
-
-                /// Configures the pin to operate as a Hi-Z floating PWM pin.
-                pub fn into_floating_pwm(self) -> $Pini<Pwm<Floating>> {
-                    self.into_pin_with_mode(8, false, false, true)
-                }
-
                 /// Configures the pin to operate as an ADC pin
                 pub fn into_adc(self) -> $Pini<Adc> {
                     // 10 -> ADC_FUNC_ANALOG

src/lib.rs

@@ -45,7 +45,6 @@ pub mod serial;
 pub mod spi;
 pub mod timer;
 pub mod watchdog;
-pub mod pwm;
 pub mod adc;
 
 /// HAL crate prelude