Remove deprecated method `#sanitize_conditions`

activerecord/CHANGELOG.md

+*   Remove deprecated method `#sanitize_conditions`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated method `#scope_chain`.
 
     *Rafael Mendonça França*

activerecord/lib/active_record/sanitization.rb

@@ -30,8 +30,6 @@ def sanitize_sql_for_conditions(condition) # :doc:
           end
         end
         alias :sanitize_sql :sanitize_sql_for_conditions
-        alias :sanitize_conditions :sanitize_sql
-        deprecate sanitize_conditions: :sanitize_sql
 
         # Accepts an array, hash, or string of SQL conditions and sanitizes
         # them into a valid SQL fragment for a SET clause.