[rubygems/rubygems] Cleanup some specs after recent support drop

https://github.com/rubygems/rubygems/commit/9548aa6766

spec/bundler/commands/binstubs_spec.rb

@@ -229,21 +229,13 @@ RSpec.describe "bundle binstubs <gem>" do
             lockfile lockfile_content
           end
 
-          it "installs and runs the exact version of bundler", rubygems: ">= 3.3.0.dev" do
+          it "installs and runs the exact version of bundler" do
             bundle "install --verbose", bundle_bin: "bin/bundle"
             expect(exitstatus).not_to eq(42)
             expect(out).to include("Bundler 2.999.999 is running, but your lockfile was generated with 2.3.0. Installing Bundler 2.3.0 and restarting using that version.")
             expect(out).to include("Using bundler 2.3.0")
             expect(err).not_to include("Activating bundler (~> 2.3.0) failed:")
           end
-
-          it "runs the available version of bundler", rubygems: "< 3.3.0.dev" do
-            bundle "install --verbose", bundle_bin: "bin/bundle"
-            expect(exitstatus).not_to eq(42)
-            expect(out).not_to include("Bundler 2.999.999 is running, but your lockfile was generated with 2.3.0. Installing Bundler 2.3.0 and restarting using that version.")
-            expect(out).to include("Using bundler 2.999.999")
-            expect(err).not_to include("Activating bundler (~> 2.3.0) failed:")
-          end
         end
 
         context "and the version is a pre-releaser" do

spec/bundler/lock/lockfile_spec.rb

@@ -84,7 +84,7 @@ RSpec.describe "the lockfile format" do
     G
   end
 
-  it "does not update the lockfile's bundler version if nothing changed during bundle install, but uses the locked version", rubygems: ">= 3.3.0.a" do
+  it "does not update the lockfile's bundler version if nothing changed during bundle install, but uses the locked version" do
     version = "2.3.0"
 
     build_repo4 do
@@ -135,61 +135,6 @@ RSpec.describe "the lockfile format" do
     G
   end
 
-  it "does not update the lockfile's bundler version if nothing changed during bundle install, and uses the latest version", rubygems: "< 3.3.0.a" do
-    version = "#{Bundler::VERSION.split(".").first}.0.0.a"
-
-    build_repo4 do
-      build_gem "myrack", "1.0.0"
-
-      build_bundler version
-    end
-
-    checksums = checksums_section do |c|
-      c.checksum(gem_repo4, "myrack", "1.0.0")
-    end
-
-    lockfile <<-L
-      GEM
-        remote: https://gem.repo4/
-        specs:
-          myrack (1.0.0)
-
-      PLATFORMS
-        #{lockfile_platforms}
-
-      DEPENDENCIES
-        myrack
-      #{checksums}
-      BUNDLED WITH
-         #{version}
-    L
-
-    install_gemfile <<-G, verbose: true
-      source "https://gem.repo4"
-
-      gem "myrack"
-    G
-
-    expect(out).not_to include("Bundler #{Bundler::VERSION} is running, but your lockfile was generated with #{version}.")
-    expect(out).to include("Using bundler #{Bundler::VERSION}")
-
-    expect(lockfile).to eq <<~G
-      GEM
-        remote: https://gem.repo4/
-        specs:
-          myrack (1.0.0)
-
-      PLATFORMS
-        #{lockfile_platforms}
-
-      DEPENDENCIES
-        myrack
-      #{checksums}
-      BUNDLED WITH
-         #{version}
-    G
-  end
-
   it "adds the BUNDLED WITH section if not present" do
     lockfile <<-L
       GEM

spec/bundler/runtime/self_management_spec.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe "Self management", rubygems: ">= 3.3.0.dev" do
+RSpec.describe "Self management" do
   describe "auto switching" do
     let(:previous_minor) do
       "2.3.0"