Remove unnecessary line to load configs

Remove line that loads RegistryConfigSettings from RegistryConfigTest.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=148236844

javatests/google/registry/config/RegistryConfigTest.java

@@ -27,7 +27,6 @@ public class RegistryConfigTest {
 
   @Test
   public void test_clientSecretFilename() {
-    RegistryConfigSettings unused = YamlUtils.getConfigSettings();
     // Verify that we're pulling this from the default.
     assertThat(RegistryConfig.getClientSecretFilename()).isEqualTo(
         "/google/registry/tools/resources/client_secret.json");