Remove is_ctfe_mir_available query

It isn't called anywhere anymore.

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -1298,10 +1298,6 @@ impl<'a> CrateMetadataRef<'a> {
         }
     }
 
-    fn is_ctfe_mir_available(self, tcx: TyCtxt<'_>, id: DefIndex) -> bool {
-        self.root.tables.mir_for_ctfe.get((self, tcx), id).is_some()
-    }
-
     fn is_item_mir_available(self, tcx: TyCtxt<'_>, id: DefIndex) -> bool {
         self.root.tables.optimized_mir.get((self, tcx), id).is_some()
     }

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -324,7 +324,6 @@ provide! { tcx, def_id, other, cdata,
     inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
     attrs_for_def => { tcx.arena.alloc_from_iter(cdata.get_item_attrs(tcx, def_id.index)) }
     is_mir_available => { cdata.is_item_mir_available(tcx, def_id.index) }
-    is_ctfe_mir_available => { cdata.is_ctfe_mir_available(tcx, def_id.index) }
     cross_crate_inlinable => { table_direct }
 
     dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }

compiler/rustc_middle/src/queries.rs

@@ -1588,11 +1588,6 @@ rustc_queries! {
         separate_provide_extern
     }
 
-    query is_ctfe_mir_available(key: DefId) -> bool {
-        desc { |tcx| "checking if item has CTFE MIR available: `{}`", tcx.def_path_str(key) }
-        cache_on_disk_if { key.is_local() }
-        separate_provide_extern
-    }
     query is_mir_available(key: DefId) -> bool {
         desc { |tcx| "checking if item has MIR available: `{}`", tcx.def_path_str(key) }
         cache_on_disk_if { key.is_local() }

compiler/rustc_mir_transform/src/lib.rs

@@ -231,7 +231,6 @@ pub fn provide(providers: &mut Providers) {
         optimized_mir,
         check_liveness: liveness::check_liveness,
         is_mir_available,
-        is_ctfe_mir_available: is_mir_available,
         mir_callgraph_cyclic: inline::cycle::mir_callgraph_cyclic,
         mir_inliner_callees: inline::cycle::mir_inliner_callees,
         promoted_mir,