[rubygems/rubygems] Remove duplicated spec

https://github.com/rubygems/rubygems/commit/86b874ed24

spec/bundler/update/git_spec.rb

@@ -293,43 +293,7 @@ RSpec.describe "bundle update" do
       G
     end
 
-    it "the --source flag updates version of gems that were originally pulled in by the source", :bundler => "< 3" do
-      spec_lines = lib_path("bar/foo.gemspec").read.split("\n")
-      spec_lines[5] = "s.version = '2.0'"
-
-      update_git "foo", "2.0", :path => @git.path do |s|
-        s.write "foo.gemspec", spec_lines.join("\n")
-      end
-
-      ref = @git.ref_for "master"
-
-      bundle "update --source bar"
-
-      expect(lockfile).to eq <<~G
-        GIT
-          remote: #{@git.path}
-          revision: #{ref}
-          specs:
-            foo (2.0)
-
-        GEM
-          remote: #{file_uri_for(gem_repo2)}/
-          specs:
-            rack (1.0.0)
-
-        PLATFORMS
-          #{lockfile_platforms}
-
-        DEPENDENCIES
-          foo!
-          rack
-
-        BUNDLED WITH
-           #{Bundler::VERSION}
-      G
-    end
-
-    it "the --source flag updates version of gems that were originally pulled in by the source", :bundler => "3" do
+    it "the --source flag updates version of gems that were originally pulled in by the source" do
       spec_lines = lib_path("bar/foo.gemspec").read.split("\n")
       spec_lines[5] = "s.version = '2.0'"