Rollup merge of #89941 - hermitcore:kernel, r=joshtriplett

removing TLS support in x86_64-unknown-none-hermitkernel

HermitCore's kernel itself doesn't support TLS. Consequently, the entries in x86_64-unknown-none-hermitkernel should be removed. This commit should help to finalize #89062.

compiler/rustc_target/src/spec/hermit_kernel_base.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, PanicStrategy, TargetOptions, TlsModel};
+use crate::spec::{LinkArgs, LinkerFlavor, LldFlavor, PanicStrategy, TargetOptions};
 
 pub fn opts() -> TargetOptions {
     let mut pre_link_args = LinkArgs::new();
@@ -13,12 +13,10 @@ pub fn opts() -> TargetOptions {
         disable_redzone: true,
         linker: Some("rust-lld".to_owned()),
         executables: true,
-        has_elf_tls: true,
         pre_link_args,
         panic_strategy: PanicStrategy::Abort,
         position_independent_executables: true,
         static_position_independent_executables: true,
-        tls_model: TlsModel::InitialExec,
         ..Default::default()
     }
 }

library/std/src/sys/hermit/net.rs

@@ -182,7 +182,7 @@ impl TcpStream {
         Ok(self.clone())
     }
 
-    pub fn set_linger(&self, linger: Option<Duration>) -> io::Result<()> {
+    pub fn set_linger(&self, _linger: Option<Duration>) -> io::Result<()> {
         unsupported()
     }