Remove gemfile.lock

Remove gemfile.lock

diff --git a/Gemfile.lock b/Gemfile.lock
deleted file mode 100644
index 759a32e..0000000
--- a/Gemfile.lock
+++ /dev/null
@@ -1,23 +0,0 @@
-PATH
-  remote: .
-  specs:
-    discourse_mail_receiver (4.0.4)
-      mail (~> 2.7.1)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    mail (2.7.1)
-      mini_mime (>= 0.1.1)
-    mini_mime (1.0.2)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  bundler (~> 2.0)
-  discourse_mail_receiver!
-  mail (~> 2.7.1)
-
-BUNDLED WITH
-   2.1.4

GitHub sha: 2d66151a