kernel-shark: Avoid the unnecessary calls of KsGLWidget::loadColors()

The tables of colors used by the OpenGL widget have to be updated
only when we load a new trace data file.

Link: http://lore.kernel.org/linux-trace-devel/20190314151012.905-10-ykaradzhov@vmware.com

Signed-off-by: Yordan Karadzhov <ykaradzhov@vmware.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/kernel-shark/src/KsGLWidget.cpp b/kernel-shark/src/KsGLWidget.cpp
index a2fcb8a..789514a 100644
--- a/kernel-shark/src/KsGLWidget.cpp
+++ b/kernel-shark/src/KsGLWidget.cpp
@@ -86,8 +86,6 @@
 {
 	glClear(GL_COLOR_BUFFER_BIT);
 
-	loadColors();
-
 	/* Draw the time axis. */
 	if(_data)
 		_drawAxisX();