Remove a few things from Rust OSS tests.

PiperOrigin-RevId: 692256780

rust/test/cpp/debug_test.rs

@@ -10,7 +10,6 @@ fn test_debug() {
     msg.set_secret_user_data("password");
 
     assert_that!(format!("{msg:?}"), contains_substring("id: 1"));
-    assert_that!(format!("{msg:?}"), not(contains_substring("password")));
 }
 
 #[cfg(lite_runtime)]
@@ -21,7 +20,6 @@ fn test_debug_lite() {
     msg.set_secret_user_data("password");
 
     assert_that!(format!("{msg:?}"), contains_substring("MessageLite"));
-    assert_that!(format!("{msg:?}"), not(contains_substring("password")));
 }
 
 /// A message with the option set to optimize for lite will behave as a lite
@@ -32,5 +30,4 @@ fn test_optimize_for_lite_option() {
     let mut msg = OptimizeForLiteTestMessage::new();
     msg.set_value("password");
     assert_that!(format!("{msg:?}"), contains_substring("MessageLite"));
-    assert_that!(format!("{msg:?}"), not(contains_substring("password")));
 }

rust/test/shared/gtest_matchers_test.rs

@@ -5,10 +5,6 @@
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd
 
-google3::import! {
-  "//third_party/protobuf/rust:protobuf_gtest_matchers";
-}
-
 use googletest::prelude::*;
 use paste::paste;
 use protobuf::proto;