Remove explicit dependency on ActiveAdmin so we can bundle a fork.

Author: varyonic

Gemfile

@@ -2,3 +2,4 @@ source 'https://rubygems.org'
 
 gemspec
 
+gem 'activeadmin', '~> 1.0'

activeadmin_selectize.gemspec

@@ -15,6 +15,6 @@ Gem::Specification.new do |spec|
   spec.files         = `git ls-files -z`.split("\x0")
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'activeadmin', '~> 1.0'
+  # spec.add_runtime_dependency 'activeadmin', '~> 1.0'
   # spec.add_runtime_dependency 'jquery-rails'
 end