Revert "Reapply [clang-repl] [test] Make an XFAIL more precise (#70991)"

This reverts commit e9db60c.
This was still failing (unexpectedly passing) on some Sony PS
buildbots.

The issue is that the clang-repl testcases don't depend on what
the default target triple is, but what the host triple is,
which is used for JIT purposes.

clang/test/Interpreter/const.cpp

@@ -1,6 +1,6 @@
 // UNSUPPORTED: system-aix
 // see https://github.com/llvm/llvm-project/issues/68092
-// XFAIL: target={{.*}}-windows-msvc, target={{.*}}-ps4, target={{.*}}-ps5
+// XFAIL: system-windows
 
 // RUN: cat %s | clang-repl | FileCheck %s
 // RUN: cat %s | clang-repl -Xcc -O2 | FileCheck %s