BIM: drop unnecessary setPixmap from wellcome window

The image is already set in the UI file, it is not necessary to set it again

src/Mod/BIM/bimcommands/BimWelcome.py

@@ -46,9 +46,6 @@ class BIM_Welcome:
         # load dialog
         self.form = FreeCADGui.PySideUic.loadUi(":ui/dialogWelcome.ui")
 
-        # set the title image
-        self.form.image.setPixmap(QtGui.QPixmap(":/icons/banner.png"))
-
         # handle the tutorial links
         self.form.label_4.linkActivated.connect(self.handleLink)
         self.form.label_7.linkActivated.connect(self.handleLink)