Stop isolating test_gc_compact on CI

I think it's been stable these days.

.travis.yml

@@ -336,8 +336,7 @@ env:
     <<: *osx
     env:
       - CONFIG_FLAG=--with-opt-dir=/usr/local/opt/openssl@1.1:/usr/local/opt/zlib
-      - TEST_ALL_OPTS="--timeout-scale=2.0 --tty=no --excludes=\$(TESTSDIR)/excludes/_travis/osx --exclude test_gc_compact"
-      - TEST_ALL_ISOLATED_TESTS="../test/ruby/test_gc_compact.rb"
+      - TEST_ALL_OPTS="--timeout-scale=2.0 --tty=no --excludes=\$(TESTSDIR)/excludes/_travis/osx"
       # Disabling -j3 because it seems to cause a hang on building Ruby: https://travis-ci.org/ruby/ruby/jobs/471021727
       - JOBS=
       # Reset timestamps early, before updating Homebrew etc.
@@ -480,10 +479,6 @@ before_script:
 script:
   - $SETARCH make -s test TESTOPTS="${TESTOPTS=$JOBS -q --tty=no}"
   - travis_wait 50 $SETARCH make -s test-all -o exts TESTOPTS="${TEST_ALL_OPTS=$TESTOPTS}" RUBYOPT="-w"
-  - |-
-    if [ -n "${TEST_ALL_ISOLATED_TESTS}" ]; then
-      $SETARCH make -s test-all -o exts TESTS="$TEST_ALL_ISOLATED_TESTS" RUBYOPT="-w"
-    fi
   - $SETARCH make -s test-spec MSPECOPT=-ff # not using `-j` because sometimes `mspec -j` silently dies
   - $SETARCH make -s leaked-globals
 

appveyor.yml

@@ -69,9 +69,9 @@ for:
     - set /a JOBS=%NUMBER_OF_PROCESSORS%
     - nmake -l "TESTOPTS=-v -q" btest
     - nmake -l "TESTOPTS=-v -q" test-basic
-    - nmake -l "TESTOPTS=-q --timeout-scale=3.0 --excludes=../test/excludes/_appveyor -j%JOBS% --exclude readline --exclude win32ole --exclude test_bignum --exclude test_syntax --exclude test_open-uri --exclude test_bundled_ca --exclude test_gc_compact" test-all
+    - nmake -l "TESTOPTS=-q --timeout-scale=3.0 --excludes=../test/excludes/_appveyor -j%JOBS% --exclude readline --exclude win32ole --exclude test_bignum --exclude test_syntax --exclude test_open-uri --exclude test_bundled_ca" test-all
     # separately execute tests without -j which may crash worker with -j.
-    - nmake -l "TESTOPTS=-v --timeout-scale=3.0 --excludes=../test/excludes/_appveyor" test-all TESTS="../test/win32ole ../test/ruby/test_bignum.rb ../test/ruby/test_syntax.rb ../test/open-uri/test_open-uri.rb ../test/rubygems/test_bundled_ca.rb ../test/ruby/test_gc_compact.rb"
+    - nmake -l "TESTOPTS=-v --timeout-scale=3.0 --excludes=../test/excludes/_appveyor" test-all TESTS="../test/win32ole ../test/ruby/test_bignum.rb ../test/ruby/test_syntax.rb ../test/open-uri/test_open-uri.rb ../test/rubygems/test_bundled_ca.rb"
     - nmake -l test-spec MSPECOPT=-fs # not using `-j` because sometimes `mspec -j` silently dies on Windows
 -
   matrix:
@@ -116,9 +116,9 @@ for:
     - if not "%GEMS_FOR_TEST%" == "" ..\install\bin\gem install --no-document %GEMS_FOR_TEST%
   test_script:
     - mingw32-make test
-    - mingw32-make test-all TESTOPTS="--retry --job-status=normal --show-skip --timeout-scale=1.5 --excludes=../ruby/test/excludes/_appveyor -j %JOBS% --exclude win32ole --exclude test_open-uri --exclude test_gc_compact"
+    - mingw32-make test-all TESTOPTS="--retry --job-status=normal --show-skip --timeout-scale=1.5 --excludes=../ruby/test/excludes/_appveyor -j %JOBS% --exclude win32ole --exclude test_open-uri"
     # separately execute tests without -j which may crash worker with -j.
-    - mingw32-make test-all TESTOPTS="--retry --job-status=normal --show-skip --timeout-scale=1.5 --excludes=../ruby/test/excludes/_appveyor" TESTS="../ruby/test/win32ole ../ruby/test/open-uri/test_open-uri.rb ../ruby/test/ruby/test_gc_compact.rb"
+    - mingw32-make test-all TESTOPTS="--retry --job-status=normal --show-skip --timeout-scale=1.5 --excludes=../ruby/test/excludes/_appveyor" TESTS="../ruby/test/win32ole ../ruby/test/open-uri/test_open-uri.rb"
     - mingw32-make test-spec MSPECOPT=-fs # not using `-j` because sometimes `mspec -j` silently dies on Windows
 notifications:
   # Using "Webhook" with templated body to skip notification on Pull Request