fix tests

Author: jeromevdl

powertools-metrics/src/test/java/software/amazon/lambda/powertools/metrics/MetricsLoggerTest.java

@@ -16,7 +16,6 @@
 
 import static java.util.Collections.emptyMap;
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatNullPointerException;
 import static org.mockito.Mockito.mockStatic;
 import static software.amazon.lambda.powertools.core.internal.SystemWrapper.getenv;
 
@@ -163,13 +162,6 @@ void singleMetricsCaptureUtilityWithDefaultNameSpace() {
         }
     }
 
-    @Test
-    void shouldThrowExceptionWhenDefaultDimensionIsNull() {
-        assertThatNullPointerException()
-                .isThrownBy(() -> MetricsUtils.defaultDimensions(null))
-                .withMessage("Null dimension set not allowed");
-    }
-
     private void testLogger(Consumer<Consumer<MetricsLogger>> methodToTest) {
         try (MockedStatic<SystemWrapper> mocked = mockStatic(SystemWrapper.class);
              MockedStatic<software.amazon.lambda.powertools.core.internal.SystemWrapper> internalWrapper = mockStatic(