Remove -fsjlj-exceptions from win32-config
This seems to be missing using i686-w64-mingw32/10-posix after updating release images to Debian 11.
It is not clear why this flag was added in the first place for win32 but not win64.
Context: https://stackoverflow.com/questions/61206449/how-to-compile-with-clang-and-mingw-w64
PiperOrigin-RevId: 651545252
diff --git a/toolchain/BUILD.bazel b/toolchain/BUILD.bazel
index 1b316ea..add1324 100644
--- a/toolchain/BUILD.bazel
+++ b/toolchain/BUILD.bazel
@@ -133,7 +133,6 @@
extra_compiler_flags = [
"-isystem/usr/lib/gcc/i686-w64-mingw32/10-posix/include/c++",
"-isystem/usr/lib/gcc/i686-w64-mingw32/10-posix/include/c++/i686-w64-mingw32",
- "-fsjlj-exceptions",
],
extra_include = "/usr/lib/gcc/i686-w64-mingw32",
extra_linker_flags = [