Rollup merge of #118858 - mu001999:dead_code/clean, r=cuviper

Remove dead codes in core
Detected by #118257

Author: workingjubilee

library/core/src/fmt/num.rs

@@ -15,7 +15,7 @@ trait DisplayInt:
 fnzero() -> Self;
 fnfrom_u8(u:u8) -> Self;
 fnto_u8(&self) -> u8;
-fnto_u16(&self) -> u16;
+#[cfg(not(any(target_pointer_width = "64", target_arch = "wasm32")))]
 fnto_u32(&self) -> u32;
 fnto_u64(&self) -> u64;
 fnto_u128(&self) -> u128;
@@ -27,7 +27,7 @@ macro_rules! impl_int {
 fn zero() -> Self{0}
 fn from_u8(u:u8) -> Self{ u asSelf}
 fn to_u8(&self) -> u8{*selfasu8}
-fn to_u16(&self) -> u16{*selfasu16}
+#[cfg(not(any(target_pointer_width = "64", target_arch = "wasm32")))]
 fn to_u32(&self) -> u32{*selfasu32}
 fn to_u64(&self) -> u64{*selfasu64}
 fn to_u128(&self) -> u128{*selfasu128}
@@ -40,7 +40,7 @@ macro_rules! impl_uint {
 fn zero() -> Self{0}
 fn from_u8(u:u8) -> Self{ u asSelf}
 fn to_u8(&self) -> u8{*selfasu8}
-fn to_u16(&self) -> u16{*selfasu16}
+#[cfg(not(any(target_pointer_width = "64", target_arch = "wasm32")))]
 fn to_u32(&self) -> u32{*selfasu32}
 fn to_u64(&self) -> u64{*selfasu64}
 fn to_u128(&self) -> u128{*selfasu128}