Removed needless files from Gem::Specification#files

drb.gemspec

@@ -19,11 +19,24 @@ Gem::Specification.new do |spec|
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = spec.homepage
 
-  # Specify which files should be added to the gem when it is released.
-  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
-    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  end
+  spec.files         = %w[
+    LICENSE.txt
+    drb.gemspec
+    lib/drb.rb
+    lib/drb/acl.rb
+    lib/drb/drb.rb
+    lib/drb/eq.rb
+    lib/drb/extserv.rb
+    lib/drb/extservm.rb
+    lib/drb/gw.rb
+    lib/drb/invokemethod.rb
+    lib/drb/observer.rb
+    lib/drb/ssl.rb
+    lib/drb/timeridconv.rb
+    lib/drb/unix.rb
+    lib/drb/version.rb
+    lib/drb/weakidconv.rb
+  ]
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]