diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 687823942..3c48eb342 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - 2.7.7
           - 3.1.3
           - 3.2.1
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40ec49b6e..189d24320 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## Unreleased
+
+#### Changed
+
+- [#1200](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/1200) Remove ActiveRecord::Relation#calculate patch
+
 ## v7.0.6
 
 #### Added
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 da0e37f80..0346a090a 100644
--- a/lib/active_record/connection_adapters/sqlserver/core_ext/calculations.rb
+++ b/lib/active_record/connection_adapters/sqlserver/core_ext/calculations.rb
@@ -8,25 +8,6 @@ module ConnectionAdapters
     module SQLServer
       module CoreExt
         module Calculations
-          # Same as original except we don't perform PostgreSQL hack that removes ordering.
-          def calculate(operation, column_name)
-            return super unless klass.connection.adapter_name == "SQLServer"
-
-            if has_include?(column_name)
-              relation = apply_join_dependency
-
-              if operation.to_s.downcase == "count"
-                unless distinct_value || distinct_select?(column_name || select_for_count)
-                  relation.distinct!
-                  relation.select_values = [klass.primary_key || table[Arel.star]]
-                end
-              end
-
-              relation.calculate(operation, column_name)
-            else
-              perform_calculation(operation, column_name)
-            end
-          end
 
           private