Remove gem version

now that the CI release process doesn't use it.

Author: RobinDaugherty

lib/better_errors/version.rb

@@ -1,3 +1,4 @@
 module BetterErrors
-  VERSION = "2.8.3"
+  # This is changed by CI before building a gem for release, but is not committed.
+  VERSION = "0.0.1dev"
 end