[test/Modules/cxx20-export-import.cpp] Pre-clean the modules cache directory of the test, NFC
GitOrigin-RevId: 7b12e561ac7aa9604022d56c8561bd472e78f2ed
diff --git a/test/Modules/cxx20-export-import.cpp b/test/Modules/cxx20-export-import.cpp
index a2620bd..6424ed5 100644
--- a/test/Modules/cxx20-export-import.cpp
+++ b/test/Modules/cxx20-export-import.cpp
@@ -1,3 +1,4 @@
+// RUN: rm -rf %t
// RUN: %clang_cc1 -std=c++20 -fmodules -fmodules-cache-path=%t -fimplicit-module-maps -I%S/Inputs -verify %s
export import dummy; // expected-error {{export declaration can only be used within a module interface unit after the module declaration}}
