QmlProfiler: Remove gradient borders

It just looks so much better with "clean" borders.

Change-Id: I9aae0e6f24556042e23580e224abb696913fc989
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/qmlprofiler/qml/MainView.qml

@@ -403,13 +403,13 @@ Rectangle {
             color: labels.color
         }
 
-        // Gradient borders
-        VerticalGradientBorder {
+        // border between labels and timeline
+        Rectangle {
             anchors.left: labels.right
             anchors.top: labels.top
             anchors.bottom: labelsTail.bottom
-            leftColor: "#00000000"
-            rightColor: "#86000000"
+            width: 1
+            color: "#858585"
         }
     }
 
@@ -484,20 +484,4 @@ Rectangle {
             }
         }
     }
-
-    VerticalGradientBorder {
-        anchors.right: root.right
-        anchors.top: root.top
-        anchors.bottom: root.bottom
-        rightColor: "#00000000"
-        leftColor: "#86000000"
-    }
-
-    HorizontalGradientBorder {
-        anchors.bottom: root.bottom
-        anchors.left: root.left
-        anchors.right: root.right
-        bottomColor: "#00000000"
-        topColor: "#86000000"
-    }
 }