[clang] [NFC][clang] Fix CodeGenSYCL::unique_stable_name_windows_diff test (PR #146854)

[Tom Honermann via cfe-commits]

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@@ -1,19 +1,19 @@
 // RUN: %clang_cc1 -triple spir64-unknown-unknown-sycldevice -aux-triple x86_64-pc-windows-msvc -fsycl-is-device -disable-llvm-passes -fsycl-is-device -emit-llvm %s -o - | FileCheck %s '-D$ADDRSPACE=addrspace(1) '
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tahonermann wrote:

The redundant `-fsycl-is-device` option can be removed.
```suggestion
// RUN: %clang_cc1 -triple spir64-unknown-unknown-sycldevice -aux-triple x86_64-pc-windows-msvc -fsycl-is-device -disable-llvm-passes -emit-llvm %s -o - | FileCheck %s '-D$ADDRSPACE=addrspace(1) '
```

https://github.com/llvm/llvm-project/pull/146854