Remove caching

Author: saethlin

compiler/rustc_middle/src/query/mod.rs

@@ -1498,7 +1498,6 @@ rustc_queries! {
     }
     query mir_flags(key: DefId) -> MirFlags {
         desc { |tcx| "stashing some local properties of `{}` before the body is stolen", tcx.def_path_str(key) }
-        cache_on_disk_if { true }
         separate_provide_extern
     }
     query required_panic_strategy(_: CrateNum) -> Option<PanicStrategy> {

compiler/rustc_mir_transform/src/lib.rs

@@ -338,8 +338,6 @@ fn mir_promoted(
         tcx.ensure_with_value().coroutine_by_move_body_def_id(def);
     }
 
-    tcx.ensure_with_value().mir_flags(def);
-
     let mut body = tcx.mir_built(def).steal();
     if let Some(error_reported) = const_qualifs.tainted_by_errors {
         body.tainted_by_errors = Some(error_reported);