Updates based on PR review comments.

Author: AlexeyKuznetsov-DD

components/environment/src/test/java/datadog/environment/EnvironmentVariablesTest.java

@@ -23,9 +23,5 @@ void testGetOrDefault() {
     assertNull(EnvironmentVariables.getOrDefault(MISSING_ENV_VAR, null));
 
     assertThrows(NullPointerException.class, () -> EnvironmentVariables.getOrDefault(null, ""));
-
-    assertEquals(42, EnvironmentVariables.getOrDefault(EXISTING_ENV_VAR, 42));
-    assertEquals(42, EnvironmentVariables.getOrDefault(MISSING_ENV_VAR, 42));
-    assertThrows(NullPointerException.class, () -> EnvironmentVariables.getOrDefault(null, 42));
   }
 }