[processing]minor code cleaning

Conflicts:
	python/plugins/processing/core/parameters.py

Author: volaya

python/plugins/processing/gui/ParametersPanel.py

@@ -37,7 +37,7 @@
 
 from qgis.PyQt import uic
 from qgis.PyQt.QtCore import QCoreApplication, QVariant
-from qgis.PyQt.QtWidgets import (QWidget, QLayout, QVBoxLayout, QHBoxLayout, QToolButton,                                  
+from qgis.PyQt.QtWidgets import (QWidget, QLayout, QVBoxLayout, QHBoxLayout, QToolButton,
                                  QLabel, QCheckBox, QComboBox, QLineEdit, QPlainTextEdit)
 from qgis.PyQt.QtGui import QIcon
 
@@ -97,11 +97,8 @@ def initWidgets(self):
                 desc += self.tr(' (xmin, xmax, ymin, ymax)')
             if isinstance(param, ParameterPoint):
                 desc += self.tr(' (x, y)')
-            try:
-                if param.optional:
-                    desc += self.tr(' [optional]')
-            except:
-                pass
+            if param.optional:
+                desc += self.tr(' [optional]')
 
             wrapper = self.getWidgetWrapperFromParameter(param)
             self.wrappers[param.name] = wrapper