CSHARP-5730: Minor cleanup before requesting re-review.

Author: rstam

src/MongoDB.Driver/Linq/Linq3Implementation/Ast/Filters/AstFilter.cs

@@ -139,31 +139,11 @@ public static AstFilterField Field(string path)
             return new AstFilterField(path);
         }
 
-        public static AstFieldOperationFilter Gt(AstFilterField field, BsonValue value)
-        {
-            return new AstFieldOperationFilter(field, new AstComparisonFilterOperation(AstComparisonFilterOperator.Gt, value));
-        }
-
-        public static AstFieldOperationFilter Gte(AstFilterField field, BsonValue value)
-        {
-            return new AstFieldOperationFilter(field, new AstComparisonFilterOperation(AstComparisonFilterOperator.Gte, value));
-        }
-
         public static AstFieldOperationFilter In(AstFilterField field, IEnumerable<BsonValue> values)
         {
             return new AstFieldOperationFilter(field, new AstInFilterOperation(values));
         }
 
-        public static AstFieldOperationFilter Lt(AstFilterField field, BsonValue value)
-        {
-            return new AstFieldOperationFilter(field, new AstComparisonFilterOperation(AstComparisonFilterOperator.Lt, value));
-        }
-
-        public static AstFieldOperationFilter Lte(AstFilterField field, BsonValue value)
-        {
-            return new AstFieldOperationFilter(field, new AstComparisonFilterOperation(AstComparisonFilterOperator.Lte, value));
-        }
-
         public static AstFilter MatchesEverything()
         {
             return new AstMatchesEverythingFilter();

src/MongoDB.Driver/Linq/Linq3Implementation/Translators/ExpressionToFilterTranslators/ExpressionTranslators/CompareComparisonExpressionToFilterTranslator.cs

@@ -14,7 +14,6 @@
 */
 
 using System.Linq.Expressions;
-using System.Reflection;
 using MongoDB.Driver.Linq.Linq3Implementation.Ast.Filters;
 using MongoDB.Driver.Linq.Linq3Implementation.ExtensionMethods;
 using MongoDB.Driver.Linq.Linq3Implementation.Misc;