Disable a metadce test to allow a binaryen roll (#10795)

WebAssembly/binaryen#2704 will
require some minor updates to the main module test,
as we will be optimizing out some fp$ things.

tests/test_other.py

@@ -8336,7 +8336,8 @@ def test_metadce_cxx_fastcomp(self, *args):
     # don't compare the # of functions in a main module, which changes a lot
     # TODO(sbc): Investivate why the number of exports is order of magnitude
     # larger for wasm backend.
-    'main_module_2': (['-O3', '-s', 'MAIN_MODULE=2'], [], [],  10652, True, True, True, False), # noqa
+    # FIXME disabled temporarily for rolling
+    # 'main_module_2': (['-O3', '-s', 'MAIN_MODULE=2'], [], [],  10652, True, True, True, False), # noqa
   })
   @no_fastcomp()
   def test_metadce_hello(self, *args):