reader/spirv: Remove stdout spam in tests

Change-Id: I06361ae5bb0f69b3ac66c3ddc22abb5988e4c4fe
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/66260
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>

src/reader/spirv/parser_impl_convert_type_test.cc

diff --git a/src/reader/spirv/parser_impl_convert_type_test.cc b/src/reader/spirv/parser_impl_convert_type_test.cc
index d5b1167..056ff39 100644
--- a/src/reader/spirv/parser_impl_convert_type_test.cc
+++ b/src/reader/spirv/parser_impl_convert_type_test.cc
@@ -706,7 +706,6 @@
     %22 = OpTypeRuntimeArray %10
   )" + MainBody();
   auto p = parser(test::Assemble(assembly));
-  std::cout << assembly << std::endl;
   EXPECT_TRUE(p->BuildAndParseInternalModule());
 
   auto* type20 = p->ConvertType(20);