Remove git churn command

I added this four years ago but haven't been using it.
Not common enough to be included in company-wide dotfiles?
Can move to personal dotfiles if desired.

README.md

@@ -203,7 +203,6 @@ Shell aliases and scripts:
 
 * `b` for `bundle`.
 * `g` with no arguments is `git status` and with arguments acts like `git`.
-* `git-churn` to show churn for the files changed in the branch.
 * `migrate` for `rake db:migrate && rake db:rollback && rake db:migrate`.
 * `mcd` to make a directory and change into it.
 * `replace foo bar **/*.rb` to find and replace within a given list of files.

bin/git-churn

@@ -1,62 +0,0 @@
-#!/usr/bin/ruby
-#
-# Put this on your $PATH (~/bin is recommended).
-#
-# Show churn for the files changed in the branch:
-#
-#   $ git-churn
-#
-
-class GitChurn
-  attr_accessor :all_files_with_churn_count, :changed_files, :result
-
-  def calculate
-    get_all_files_with_churn_count
-    get_changed_files
-    filter_into_result
-    print_result
-  end
-
-  private
-
-  def get_all_files_with_churn_count
-    self.all_files_with_churn_count =
-      `git log --all #{format_logs} | #{remove_blank_lines} | #{sort_by_ascending_churn_count}`.split("\n")
-  end
-
-  def format_logs
-    "--name-only --format='format:'"
-  end
-
-  def remove_blank_lines
-    "grep -v '^$'"
-  end
-
-  def sort_by_ascending_churn_count
-    'sort | uniq -c | sort'
-  end
-
-  def get_changed_files
-    self.changed_files =
-      `git log origin/master..HEAD #{format_logs} | #{remove_blank_lines} | #{remove_duplicates}`.split("\n")
-  end
-
-  def remove_duplicates
-    'sort | uniq'
-  end
-
-  def filter_into_result
-    self.result = all_files_with_churn_count.select { |file| file_changed?(file) }.join("\n")
-  end
-
-  def file_changed?(file)
-    changed_files.any? { |changed_file| file.include?(changed_file) }
-  end
-
-  def print_result
-    puts result
-  end
-end
-
-git_churn = GitChurn.new
-git_churn.calculate