[meta] clean deprecated bumper script (#741)

helpers/bumper.py

@@ -1,36 +0,0 @@
-#!/usr/bin/env python3
-import fileinput
-import os
-
-"""
-This script is used to bump elasticsearch versions before a new release
-
-Usage:
-- Change the values of `old_versions` and `new_versions``
-- Run the script: `./bumper.py`
-- That's all
-"""
-
-os.chdir(os.path.join(os.path.dirname(__file__), '..'))
-
-old_versions = {
-    6: '6.8.12',
-    7: '7.9.1',
-}
-
-new_versions = {
-    6: '6.8.12',
-    7: '7.9.2',
-}
-
-files = [
-    'README.md',
-    'defaults/main.yml',
-    '.kitchen.yml',
-]
-
-for major, version in old_versions.items():
-    for file in files:
-        print(file)
-        for line in fileinput.input([file], inplace=True):
-            print(line.replace(version, new_versions[major]), end='')