Remove the wide try/expect clause

This doesn't catch anything precise, and none of the methods should
throw a expection for anything. This also hide python 3 errors.

lib/ansible/modules/system/authorized_key.py

@@ -243,7 +243,6 @@ def parseoptions(module, options):
     '''
     options_dict = keydict() #ordered dict
     if options:
-        try:
         # the following regex will split on commas while
         # ignoring those commas that fall within quotes
         regex = re.compile(r'''((?:[^,"']|"[^"]*"|'[^']*')+)''')
@@ -260,8 +259,6 @@ def parseoptions(module, options):
                     options_dict[key] = value
             elif part != ",":
                 options_dict[part] = None
-        except:
-            module.fail_json(msg="invalid option string: %s" % options)
 
     return options_dict