Fix static checks.

Author: vbabanin

driver-core/src/main/com/mongodb/internal/EnvironmentProvider.java

@@ -65,4 +65,4 @@ public void close() {
             envLookup = original;
         }
     }
-}
+}

driver-sync/src/test/functional/com/mongodb/client/AbstractMicrometerProseTest.java

@@ -18,6 +18,8 @@
 
 import com.mongodb.MongoClientSettings;
 import com.mongodb.internal.EnvironmentProvider;
+import com.mongodb.observability.micrometer.MongodbObservationContext;
+import com.mongodb.observability.micrometer.MongodbObservation;
 import com.mongodb.observability.ObservabilitySettings;
 import com.mongodb.client.observability.SpanTree;
 import com.mongodb.client.observability.SpanTree.SpanNode;