chore: Drop dead code

bench.prepare_staging module wasn't being utilized from any internal
APIs. Dropped it ;)

bench/prepare_staging.py

@@ -1,71 +0,0 @@
-#! env python
-import os
-import git
-import click
-from .config.common_site_config import get_config
-
-github_username = None
-github_password = None
-
-def prepare_staging(bench_path, app, remote='upstream'):
-	from .release import get_release_message
-	validate(bench_path)
-
-	repo_path = os.path.join(bench_path, 'apps', app)
-	update_branches(repo_path, remote)
-	message = get_release_message(repo_path, from_branch='develop', to_branch='staging', remote=remote)
-
-	if not message:
-		print('No commits to release')
-		return
-
-	print(message)
-
-	click.confirm('Do you want to continue?', abort=True)
-
-	create_staging(repo_path)
-	push_commits(repo_path)
-
-def validate(bench_path):
-	from .release import validate
-
-	config = get_config(bench_path)
-	validate(bench_path, config)
-
-def update_branches(repo_path, remote):
-	from .release import update_branch
-	update_branch(repo_path, 'staging', remote)
-	update_branch(repo_path, 'develop', remote)
-
-	git.Repo(repo_path).git.checkout('develop')
-
-def create_staging(repo_path, from_branch='develop'):
-	from .release import handle_merge_error
-
-	print('creating staging from', from_branch)
-	repo = git.Repo(repo_path)
-	g = repo.git
-	g.checkout('staging')
-	try:
-		g.merge(from_branch, '--no-ff')
-	except git.exc.GitCommandError as e:
-		handle_merge_error(e, source=from_branch, target='staging')
-
-	g.checkout(from_branch)
-	try:
-		g.merge('staging')
-	except git.exc.GitCommandError as e:
-		handle_merge_error(e, source='staging', target=from_branch)
-
-def push_commits(repo_path, remote='upstream'):
-	print('pushing staging branch of', repo_path)
-
-	repo = git.Repo(repo_path)
-	g = repo.git
-
-	args = [
-		'develop:develop',
-		'staging:staging'
-	]
-
-	print(g.push(remote, *args))