revert pie titleText changes

Author: archmoj

src/traces/pie/plot.js

@@ -239,18 +239,10 @@ function plot(gd, cdModule) {
                     transform = positionTitleOutside(cd0, gs);
                 }
 
-                var scale = Math.min(1, transform.scale);
-
-                if(scale) {
-                    titleText.attr('transform',
-                        strTranslate(transform.x, transform.y) +
-                        strScale(scale) +
-                        strTranslate(transform.tx, transform.ty));
-
-                    titleText.style('display', null);
-                } else {
-                    titleText.style('display', 'none');
-                }
+                titleText.attr('transform',
+                    strTranslate(transform.x, transform.y) +
+                    strScale(Math.min(1, transform.scale)) +
+                    strTranslate(transform.tx, transform.ty));
             });
 
             // now make sure no labels overlap (at least within one pie)