Drop the QtSvg dependency as it is no longer used

nw/__init__.py

@@ -199,28 +199,28 @@ def main(sysArgs=None):
 
     # Check Packages and Versions
     errorData = []
+    errorCode = 0
     if sys.hexversion < 0x030403f0:
         errorData.append(
             "At least Python 3.4.3 is required, but 3.6 is highly recommended."
         )
+        errorCode |= 4
     if CONFIG.verQtValue < 50200:
         errorData.append(
             "At least Qt5 version 5.2 is required, found %s." % CONFIG.verQtString
         )
+        errorCode |= 8
     if CONFIG.verPyQtValue < 50200:
         errorData.append(
             "At least PyQt5 version 5.2 is required, found %s." % CONFIG.verPyQtString
         )
-
-    try:
-        import PyQt5.QtSvg # noqa: F401
-    except ImportError:
-        errorData.append("Python module 'PyQt5.QtSvg' is missing.")
+        errorCode |= 16
 
     try:
         import lxml # noqa: F401
     except ImportError:
         errorData.append("Python module 'lxml' is missing.")
+        errorCode |= 32
 
     if errorData:
         if not testMode:
@@ -236,7 +236,7 @@ def main(sysArgs=None):
                 "<br>&nbsp;-&nbsp;".join(errorData)
             ))
             errApp.exec_()
-        sys.exit(10 + len(errorData))
+        sys.exit(errorCode)
 
     # Finish initialising config
     CONFIG.initConfig(confPath, dataPath)