Fix instrumentation XML and remove usings.

Author: jaffinito

src/Agent/NewRelic/Agent/Extensions/Providers/Wrapper/MongoDb26/Instrumentation.xml

@@ -39,7 +39,7 @@ SPDX-License-Identifier: Apache-2.0
     </tracerFactory>
 
     <tracerFactory name="AsyncCursorWrapper">
-      <match assemblyName="MongoDB.Driver.Core" className="MongoDB.Driver.Core.Operations.AsyncCursor`1" maxVersion="2.999.0">
+      <match assemblyName="MongoDB.Driver.Core" className="MongoDB.Driver.Core.Operations.AsyncCursor`1" maxVersion="3.0.0">
         <exactMethodMatcher methodName="GetNextBatch"/>
         <exactMethodMatcher methodName="GetNextBatchAsync"/>
       </match>
@@ -51,7 +51,7 @@ SPDX-License-Identifier: Apache-2.0
     </tracerFactory>
 
     <tracerFactory name="MongoDatabaseWrapper">
-      <match assemblyName="MongoDB.Driver" className="MongoDB.Driver.MongoDatabaseImpl"  maxVersion="2.999.0">
+      <match assemblyName="MongoDB.Driver" className="MongoDB.Driver.MongoDatabaseImpl"  maxVersion="3.0.0">
         <exactMethodMatcher methodName="Aggregate"/>
         <exactMethodMatcher methodName="AggregateToCollection"/>
         <exactMethodMatcher methodName="CreateCollection"/>

src/Agent/NewRelic/Agent/Extensions/Providers/Wrapper/MongoDb26/MongoDbHelper.cs

@@ -4,14 +4,11 @@
 using System;
 using System.Collections;
 using System.Collections.Concurrent;
-using System.ComponentModel.Design;
 using System.Net;
 using NewRelic.Agent.Extensions.Helpers;
 using NewRelic.Agent.Extensions.Parsing;
-using NewRelic.Agent.Extensions.Providers.Wrapper;
 using NewRelic.Agent.Extensions.Parsing.ConnectionString;
 using NewRelic.Reflection;
-using System.Reflection;
 
 namespace NewRelic.Providers.Wrapper.MongoDb26
 {