RecExOnline: delete unused hash_tool

Delete unused hash_tool and suppress flake8-bugbear warning.

Reconstruction/RecExample/RecExOnline/python/hash_tool.py

-# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
-
-import inspect
-import warnings
-
-class HashTool:
-    def __init__(self, *args, **parse):
-        self.argvals = tuple()
-        self.objs = tuple()
-        self.signatures = args
-        self.parse = parse
-
-    def vars_wrapper(self,*args,**kwargs):
-        argspec = inspect.getargspec(self.func)
-        args_name,varargs_name = argspec[:-2]
-        argval = dict(zip(args_name, args[:len(args_name)]) + [(varargs_name, args[len(args_name):])] + kwargs.items())
-        signatures = self.signatures if self.signatures else argval.keys()
-        pattern = dict((s, argval[s]) for s in signatures)
-        try:
-            i = self.argvals.index(pattern)
-            warnings.warn("Hash index founded. Stored object is used instead of creating a new one.")
-            return self.objs[i]
-        except ValueError:
-            self.argvals += (pattern,)
-            try:
-                obj = self.func(*args,**dict(kwargs, **self.parse))
-            except TypeError:
-                obj = self.func(*args, **kwargs)
-            self.objs += (obj,)
-            return obj     
-    def __call__(self, func):
-        self.func = func
-        self.vars_wrapper.__func__.__doc__ = self.func.__doc__
-        return self.vars_wrapper
-
-class Do:
-    def __init__(self, do):
-        self.do = do
-    def vars_wrapper(self, *args, **kwargs):
-        ret = self.func(*args, **kwargs)
-        self.do(ret)
-        return ret
-    def __call__(self, func):
-        self.func = func
-        return self.vars_wrapper