Remove old binary from gemspec.

Author: ioquatix

rubydns.gemspec

@@ -23,8 +23,6 @@ Gem::Specification.new do |spec|
 
 	spec.files = Dir.glob(["{lib}/**/*", "*.md"], File::FNM_DOTMATCH, base: __dir__)
 
-	spec.executables = ["rubydns-check"]
-	
 	spec.required_ruby_version = ">= 3.1"
 
 	spec.add_dependency "async-dns", "~> 1.0"