Remove stdout output from test

Change-Id: If1c4b72f636f7aa9d8fac81b5172dd050b06dc32
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/37500
Commit-Queue: David Neto <dneto@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Auto-Submit: David Neto <dneto@google.com>
Reviewed-by: dan sinclair <dsinclair@chromium.org>

src/reader/spirv/parser_impl_handle_test.cc

diff --git a/src/reader/spirv/parser_impl_handle_test.cc b/src/reader/spirv/parser_impl_handle_test.cc
index 377df07..f0294b6 100644
--- a/src/reader/spirv/parser_impl_handle_test.cc
+++ b/src/reader/spirv/parser_impl_handle_test.cc
@@ -4499,7 +4499,6 @@
            OpFunctionEnd
   )";
   auto p = parser(test::Assemble(assembly));
-  std::cout << assembly;
   EXPECT_FALSE(p->BuildAndParseInternalModule()) << assembly;
   EXPECT_THAT(p->error(),
               HasSubstr("WGSL does not support combined image-samplers: "));