remove const

Author: DebugSteven

library/core/src/panicking.rs

@@ -67,9 +67,8 @@ pub const fn panic_fmt(fmt: fmt::Arguments<'_>) -> ! {
 #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
 #[cfg_attr(feature = "panic_immediate_abort", inline)]
 #[track_caller]
-#[rustc_do_not_const_check] // hooked by const-eval
-#[rustc_const_unstable(feature = "core_panic", issue = "none")]
-pub const fn panic_source(fmt: fmt::Arguments<'_>, source: &(dyn Error + 'static)) -> ! {
+#[unstable(feature = "error_in_panic", issue = "none")]
+pub fn panic_source(fmt: fmt::Arguments<'_>, source: &(dyn Error + 'static)) -> ! {
     if cfg!(feature = "panic_immediate_abort") {
         super::intrinsics::abort()
     }