Fix incorrect indention of close statement

Commit 8ea1c74e2f moved the f.close()
statement to the wrong indention level, thereby closing the file
prematurely when reading Datagroups from a file. Since files are closed
automatically due to the with statement, we just remove the explicit
call to close().

virtualsmartcard/src/vpicc/virtualsmartcard/CardGenerator.py

@@ -434,7 +434,6 @@ class CardGenerator(object):
                     splitLine = line.split("=")
                     # we don't want to have the newline char from dataset file as part of the value!!
                     self.datagroups[splitLine[0]] = splitLine[1].rstrip("\n\r")
-                    f.close()
 
 if __name__ == "__main__":
     from optparse import OptionParser