scripts: Removed clearly unused isinf condition in dat parser

scripts/treemap.py

@@ -60,9 +60,6 @@ def dat(x):
     # then try as float
     try:
         return float(x)
-        # just don't allow infinity or nan
-        if mt.isinf(x) or mt.isnan(x):
-            raise ValueError("invalid dat %r" % x)
     except ValueError:
         pass