Remove text_painter destructor.

Yuncong Zhang · Yuncong Zhang · commit 1b7e953d6a79 · 2019-07-18T12:23:50.000+08:00
diff --git a/Runtime/painting/text_painter.cs b/Runtime/painting/text_painter.cs
@@ -34,10 +34,6 @@ public TextPainter(TextSpan text = null,
             this._ellipsis = ellipsis;
         }
 
-        ~TextPainter() {
-            Paragraph.release(ref this._paragraph);
-        }
-
         public float textScaleFactor {
             get { return this._textScaleFactor; }
             set {
