spawaveform.py: remove leftover pylal stuff

gstlal-inspiral/python/spawaveform.py

@@ -36,13 +36,10 @@ import math
 
 
 import lal
-from pylal import git_version
-from pylal._spawaveform import *
+from ._spawaveform import *
 
 
 __author__ = "Kipp Cannon <kipp.cannon@ligo.org>"
-__version__ = "git id %s" % git_version.id
-__date__ = git_version.date
 
 
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