fdo#66025: Simplify new ImportError logic

Signed-off-by: Stephan Bergmann <sbergman@redhat.com>
diff --git a/pyuno/source/module/uno.py b/pyuno/source/module/uno.py
index d5da804..15af94a 100644
--- a/pyuno/source/module/uno.py
+++ b/pyuno/source/module/uno.py
@@ -279,15 +279,14 @@ def _uno_import( name, *optargs, **kwargs ):
        d = mod.__dict__

    RuntimeException = pyuno.getClass( "com.sun.star.uno.RuntimeException" )
    unknown = object() # unknown/missing sentinel
    for x in fromlist:
       if x not in d:
          d[x] = unknown
          failed = False
          if x.startswith( "typeOf" ):
             try: 
                d[x] = pyuno.getTypeByName( name + "." + x[6:len(x)] )
             except RuntimeException:
                pass
                failed = True
          else:
            try:
                # check for structs, exceptions or interfaces
@@ -301,12 +300,9 @@ def _uno_import( name, *optargs, **kwargs ):
                   try:
                      d[x] = getConstantByName( name + "." + x )
                   except RuntimeException:
                      pass
                      failed = True

          if d[x] is unknown:
             # Remove unknown placeholder we created
             del d[x]

          if failed:
             # This can be a bad uno reference, or it can just result from any
             # python import failure (in a "from xxx import yyy" statement).
             # Synthesize a general purpose exception, reusing the original