Remove unused gpio_af from codegen

embassy-stm32/gen.py

@@ -33,10 +33,6 @@ if len(c) > 1:
 with open(f'{data_path}/chips/{chip_name}.yaml', 'r') as f:
     chip = yaml.load(f, Loader=SafeLoader)
 
-# ======= load GPIO AF
-with open(f'{data_path}/gpio_af/{chip["gpio_af"]}.yaml', 'r') as f:
-    af = yaml.load(f, Loader=SafeLoader)
-
 # ======= Generate!
 with open(output_file, 'w') as f:
     singletons = []  # USART1, PA5, EXTI8

stm32-metapac/gen/src/lib.rs

@@ -19,7 +19,6 @@ pub struct Chip {
     pub cores: Vec<Core>,
     pub flash: u32,
     pub ram: u32,
-    pub gpio_af: String,
     pub packages: Vec<Package>,
 }