remove (revert back) not used ruby_version detection

bundler/lib/dependabot/bundler/helpers.rb

@@ -35,96 +35,6 @@ def self.detected_bundler_version(lockfile)
           "unspecified"
         end
       end
-
-      sig do
-        params(
-          gemfile: T.nilable(Dependabot::DependencyFile),
-          lockfile: T.nilable(Dependabot::DependencyFile)
-        ).returns(Gem::Version)
-      end
-      def self.ruby_version(gemfile, lockfile)
-        ruby_version = ruby_version_from_ruby_version_file
-
-        ruby_version = ruby_version_from_lockfile(lockfile) if ruby_version.nil?
-
-        ruby_version = ruby_version_from_definition(gemfile, lockfile) if ruby_version.nil?
-
-        ruby_version = RUBY_VERSION if ruby_version.nil?
-
-        Gem::Version.new(ruby_version)
-      end
-
-      sig do
-        params(
-          lockfile: T.nilable(Dependabot::DependencyFile)
-        ).returns(T.nilable(String))
-      end
-      def self.ruby_version_from_lockfile(lockfile)
-        return nil unless lockfile
-
-        ruby_version = lockfile.content&.match(/RUBY VERSION\s+(?<version>[^\s]+)/)&.named_captures&.fetch(
-          "version", nil
-        )
-        ruby_version
-      end
-
-      sig do
-        params(
-          gemfile: T.nilable(Dependabot::DependencyFile),
-          lockfile: T.nilable(Dependabot::DependencyFile)
-        )
-          .returns(T.nilable(String))
-      end
-      def self.ruby_version_from_definition(gemfile, lockfile)
-        gemfile_name = gemfile&.name
-        return nil unless gemfile_name
-
-        ruby_version = T.let(build_definition(gemfile, lockfile).ruby_version, T.nilable(::Bundler::RubyVersion))
-
-        gem_version = T.let(ruby_version&.gem_version, T.nilable(Gem::Version))
-
-        return nil unless gem_version
-
-        gem_version.to_s
-      end
-
-      sig do
-        params(
-          gemfile: T.nilable(Dependabot::DependencyFile),
-          lockfile: T.nilable(Dependabot::DependencyFile)
-        ).returns(::Bundler::Definition)
-      end
-      def self.build_definition(gemfile, lockfile)
-        gemfile_name = gemfile&.name
-        lockfile_name = lockfile&.name
-        T.let(
-          ::Bundler::Definition.build(
-            gemfile_name,
-            lockfile_name,
-            gems: []
-          ), ::Bundler::Definition
-        )
-      end
-
-      sig { returns(T.nilable(String)) }
-      def self.ruby_version_from_ruby_version_file
-        # Ensure file_content is either a String or nil
-        file_content = T.let(::Bundler.read_file(".ruby-version"), T.nilable(String))
-
-        return nil unless file_content.is_a?(String)
-
-        # Regex match to extract the Ruby version
-        ruby_version = if /^ruby(-|\s+)?([^\s#]+)/ =~ file_content
-                         T.let(::Regexp.last_match(2), T.nilable(String))
-                       else
-                         T.let(file_content.strip, T.nilable(String))
-                       end
-
-        ruby_version
-      rescue SystemCallError
-        # Handle .ruby-version file not existing, return nil
-        nil
-      end
     end
   end
 end