Simplify Node constructor for trivial case.

src/Workspaces/Core/Portable/Formatting/ContextIntervalTree.cs

@@ -31,7 +31,7 @@ public ContextIntervalTree(IIntervalIntrospector<T> introspector)
 
         public void AddIntervalInPlace(T value)
         {
-            var newNode = new Node(Introspector, value);
+            var newNode = new Node(value);
             this.root = Insert(root, newNode, Introspector);
         }
 

src/Workspaces/Core/Portable/Shared/Collections/IntervalTree`1.Node.cs

@@ -18,9 +18,11 @@ protected class Node
             internal int Height { get; private set; }
             internal Node MaxEndNode { get; private set; }
 
-            internal Node(IIntervalIntrospector<T> introspector, T interval)
-                : this(introspector, interval, left: null, right: null)
+            internal Node(T value)
             {
+                this.Value = value;
+                this.Height = 1;
+                this.MaxEndNode = this;
             }
 
             internal Node(IIntervalIntrospector<T> introspector, T value, Node left, Node right)

src/Workspaces/Core/Portable/Shared/Collections/IntervalTree`1.cs

@@ -31,7 +31,7 @@ public IntervalTree(IIntervalIntrospector<T> introspector, IEnumerable<T> values
         {
             foreach (var value in values)
             {
-                root = Insert(root, new Node(introspector, value), introspector);
+                root = Insert(root, new Node(value), introspector);
             }
         }
 

src/Workspaces/Core/Portable/Shared/Collections/SimpleIntervalTree`1.cs

@@ -19,7 +19,7 @@ public SimpleIntervalTree(IIntervalIntrospector<T> introspector, IEnumerable<T>
             {
                 foreach (var value in values)
                 {
-                    root = Insert(root, new Node(introspector, value), introspector);
+                    root = Insert(root, new Node(value), introspector);
                 }
             }
         }