Remove unused panic_runtime field from CrateInfo

compiler/rustc_codegen_ssa/src/base.rs

@@ -774,7 +774,6 @@ pub fn new(tcx: TyCtxt<'_>, target_cpu: String) -> CrateInfo {
         let mut info = CrateInfo {
             linker_info,
             local_crate_name,
-            panic_runtime: None,
             compiler_builtins: None,
             profiler_runtime: None,
             is_no_builtins: Default::default(),
@@ -803,9 +802,6 @@ pub fn new(tcx: TyCtxt<'_>, target_cpu: String) -> CrateInfo {
                 .insert(cnum, tcx.native_libraries(cnum).iter().map(Into::into).collect());
             info.crate_name.insert(cnum, tcx.crate_name(cnum).to_string());
             info.used_crate_source.insert(cnum, tcx.used_crate_source(cnum));
-            if tcx.is_panic_runtime(cnum) {
-                info.panic_runtime = Some(cnum);
-            }
             if tcx.is_compiler_builtins(cnum) {
                 info.compiler_builtins = Some(cnum);
             }

compiler/rustc_codegen_ssa/src/lib.rs

@@ -137,7 +137,6 @@ fn from(lib: &cstore::NativeLib) -> Self {
 pub struct CrateInfo {
     pub linker_info: back::linker::LinkerInfo,
     pub local_crate_name: Symbol,
-    pub panic_runtime: Option<CrateNum>,
     pub compiler_builtins: Option<CrateNum>,
     pub profiler_runtime: Option<CrateNum>,
     pub is_no_builtins: FxHashSet<CrateNum>,