Do not append to `sys.path`

The modification of `sys.path` was added in commit 034d96fe to have
access to `util_eddies`. It is no longer useful, since commit
d16d3f1c, when a symbolic link was added.

Inst_eddies/Analysis/eddy_dump.py

@@ -10,7 +10,6 @@ import shapefile
 from os import path
 import pprint
 import sys
-sys.path.append(path.join(sys.path[0], "../../Common"))
 import util_eddies
 import report_graph
 import json