Delete standard output in VtsAidlKeyMintTargetTest

The Done flag of VtsAidlKeyMintTargetTest is false during running
the module with ‘--collect-tests-only’ because it uses standard
output to print logs.

Bug: 340576534
Test: run vts -m VtsAidlKeyMintTargetTest --collect-tests-only

Change-Id: I3d81f7e59b6189fab1b146320263509f2694c11e
Signed-off-by: Huang Rui <rui1.huang@intel.com>
Signed-off-by: Liu Kai <kai1.liu@intel.com>
diff --git a/security/keymint/aidl/vts/functional/KeyMintTest.cpp b/security/keymint/aidl/vts/functional/KeyMintTest.cpp
index 65a4645..35e5e84 100644
--- a/security/keymint/aidl/vts/functional/KeyMintTest.cpp
+++ b/security/keymint/aidl/vts/functional/KeyMintTest.cpp
@@ -8917,13 +8917,6 @@
 using aidl::android::hardware::security::keymint::test::KeyMintAidlTestBase;
 
 int main(int argc, char** argv) {
-    std::cout << "Testing ";
-    auto halInstances = KeyMintAidlTestBase::build_params();
-    std::cout << "HAL instances:\n";
-    for (auto& entry : halInstances) {
-        std::cout << "    " << entry << '\n';
-    }
-
     ::testing::InitGoogleTest(&argc, argv);
     for (int i = 1; i < argc; ++i) {
         if (argv[i][0] == '-') {