Disable stat tests

Summary: These `stat` tests aren't aging well and have always been brittle. Hermit is largely unsupported now, so I'm disabling them.

Reviewed By: capickett

Differential Revision: D54096278

fbshipit-source-id: 9f003b6aae2b218e995fbb826faa730c3005832b

detcore/Cargo.toml

@@ -1,4 +1,4 @@
-# @generated by autocargo from //hermetic_infra/hermit/detcore:[detcore,syscaller,tests_misc,tests_parallelism,tests_stats,tests_time]
+# @generated by autocargo from //hermetic_infra/hermit/detcore:[detcore,syscaller,tests_misc,tests_parallelism,tests_time]
 
 [package]
 name = "detcore"
@@ -19,10 +19,6 @@ path = "tests/misc/mod.rs"
 name = "tests_parallelism"
 path = "tests/parallelism/mod.rs"
 
-[[test]]
-name = "tests_stats"
-path = "tests/stats/mod.rs"
-
 [[test]]
 name = "tests_time"
 path = "tests/time/mod.rs"