Removed minitest and hoe because they didn't support Ruby 3 yet

.github/workflows/macos.yml

@@ -51,7 +51,7 @@ jobs:
         env:
           RUBY_TESTOPTS: "-q --tty=no"
           # Remove minitest from TEST_BUNDLED_GEMS_ALLOW_FAILURES if https://github.com/seattlerb/minitest/pull/798 is resolved
-          TEST_BUNDLED_GEMS_ALLOW_FAILURES: "minitest,xmlrpc,rexml"
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: "rake,minitest,xmlrpc,rexml"
       - uses: k0kubun/action-slack@v2.0.0
         with:
           payload: |

.github/workflows/ubuntu.yml

@@ -73,7 +73,7 @@ jobs:
         env:
           RUBY_TESTOPTS: "-q --tty=no"
           # Remove minitest from TEST_BUNDLED_GEMS_ALLOW_FAILURES if https://github.com/seattlerb/minitest/pull/798 is resolved
-          TEST_BUNDLED_GEMS_ALLOW_FAILURES: "minitest,xmlrpc"
+          TEST_BUNDLED_GEMS_ALLOW_FAILURES: "rake,minitest,xmlrpc"
       - uses: k0kubun/action-slack@v2.0.0
         with:
           payload: |

common.mk

@@ -1342,7 +1342,7 @@ test-bundled-gems-prepare: $(TEST_RUNNABLE)-test-bundled-gems-prepare
 no-test-bundled-gems-prepare: no-test-bundled-gems-precheck
 yes-test-bundled-gems-prepare: yes-test-bundled-gems-precheck
 	$(XRUBY) -C "$(srcdir)" bin/gem install --no-document \
-		--install-dir .bundle --conservative "bundler" "minitest:~> 5" 'test-unit' 'rake' 'hoe' 'yard' 'pry' 'packnga' 'rexml'
+		--install-dir .bundle --conservative "bundler" 'test-unit' 'rake' 'yard' 'pry' 'packnga' 'rexml'
 
 PREPARE_BUNDLED_GEMS = test-bundled-gems-prepare
 test-bundled-gems: $(TEST_RUNNABLE)-test-bundled-gems