S1694: Promote C# to SonarWay and remove protected constructor

rules/S1694/csharp/metadata.json

@@ -1,3 +1,5 @@
 {
-
+  "defaultQualityProfiles": [
+    "Sonar way"
+  ]
 }

rules/S1694/csharp/rule.adoc

@@ -2,11 +2,7 @@
 
 The purpose of an abstract class is to provide some heritable behaviors while also defining methods which must be implemented by sub-classes.
 
-
-A ``++class++`` with no abstract methods that was made ``++abstract++`` purely to prevent instantiation should be converted to a concrete ``++class++`` (i.e. remove the ``++abstract++`` keyword) with a ``++protected++`` constructor.
-
-
-A ``++class++`` with only ``++abstract++`` methods and no inheritable behavior should be converted to an ``++interface++``.
+A `class` with only `abstract` methods and no inheritable behavior should be converted to an `interface`.
 
 === Noncompliant code example
 
@@ -17,18 +13,6 @@ public abstract class Animal // Noncompliant; should be an interface
   abstract void Move();
   abstract void Feed();
 }
-
-public abstract class Color // Noncompliant; should be concrete with a protected constructor
-{
-  private int red = 0;
-  private int green = 0;
-  private int blue = 0;
-
-  public int GetRed()
-  {
-    return red;
-  }
-}
 ----
 
 === Compliant solution
@@ -41,21 +25,6 @@ public interface Animal
   void Feed();
 }
 
-public class Color
-{
-  private int red = 0;
-  private int green = 0;
-  private int blue = 0;
-
-  protected Color()
-  {}
-
-  public int GetRed()
-  {
-    return red;
-  }
-}
-
 public abstract class Lamp
 {
   private bool switchLamp = false;
@@ -81,7 +50,7 @@ ifdef::env-github,rspecator-view[]
 
 === Message
 
-Convert this "abstract" (class|record) to (an interface|a concrete type with a private constructor).
+Convert this "abstract" (class|record) to an interface.
 
 
 '''