diff --git a/lib/active_record/connection_adapters/sqlserver/core_ext/calculations.rb b/lib/active_record/connection_adapters/sqlserver/core_ext/calculations.rb
index abc690744..b1a272d1d 100644
--- a/lib/active_record/connection_adapters/sqlserver/core_ext/calculations.rb
+++ b/lib/active_record/connection_adapters/sqlserver/core_ext/calculations.rb
@@ -8,53 +8,6 @@ module ConnectionAdapters
     module SQLServer
       module CoreExt
         module Calculations
-          def calculate(operation, column_name)
-            klass.with_connection do |connection|
-              if connection.sqlserver?
-                _calculate(operation, column_name)
-              else
-                super
-              end
-            end
-          end
-
-          private
-
-          # Same as original `calculate` method except we don't perform PostgreSQL hack that removes ordering.
-          def _calculate(operation, column_name)
-            operation = operation.to_s.downcase
-
-            if @none
-              case operation
-              when "count", "sum"
-                result = group_values.any? ? Hash.new : 0
-                return @async ? Promise::Complete.new(result) : result
-              when "average", "minimum", "maximum"
-                result = group_values.any? ? Hash.new : nil
-                return @async ? Promise::Complete.new(result) : result
-              end
-            end
-
-            if has_include?(column_name)
-              relation = apply_join_dependency
-
-              if operation == "count"
-                unless distinct_value || distinct_select?(column_name || select_for_count)
-                  relation.distinct!
-                  relation.select_values = Array(klass.primary_key || table[Arel.star])
-                end
-                # PostgreSQL: ORDER BY expressions must appear in SELECT list when using DISTINCT
-                # Start of monkey-patch
-                # relation.order_values = [] if group_values.empty?
-                # End of monkey-patch
-              end
-
-              relation.calculate(operation, column_name)
-            else
-              perform_calculation(operation, column_name)
-            end
-          end
-
           def build_count_subquery(relation, column_name, distinct)
             klass.with_connection do |connection|
               relation = relation.unscope(:order) if connection.sqlserver?