Remove Ruby 3.0 (#700)

* Remove Ruby 3.0

* Remove 3.0 integration test

buildpack.toml

@@ -18,32 +18,6 @@ api = "0.7"
   [metadata.default-versions]
     ruby = "3.1.*"
 
-  [[metadata.dependencies]]
-    checksum = "sha256:0de6dcaca9e8dd1efdcf07e400eab8a7a8f19b5b5bdf206cd8da16b59f93752c"
-    cpe = "cpe:2.3:a:ruby-lang:ruby:3.0.5:*:*:*:*:*:*:*"
-    id = "ruby"
-    licenses = ["BSD-2-Clause", "BSD-2-Clause-NetBSD", "BSD-3-Clause", "BSD-3-Clause-No-Nuclear-License-2014", "Bison-exception-2.2", "FSFUL", "GPL-2.0-only", "GPL-2.0-or-later", "MIT", "MIT-0", "Ruby", "deprecated_GPL-2.0", "deprecated_GPL-2.0+"]
-    name = "Ruby"
-    purl = "pkg:generic/[email protected]?checksum=9afc6380a027a4fe1ae1a3e2eccb6b497b9c5ac0631c12ca56f9b7beb4848776&download_url=https://cache.ruby-lang.org/pub/ruby/3.0/ruby-3.0.5.tar.gz"
-    source = "https://cache.ruby-lang.org/pub/ruby/3.0/ruby-3.0.5.tar.gz"
-    source-checksum = "sha256:9afc6380a027a4fe1ae1a3e2eccb6b497b9c5ac0631c12ca56f9b7beb4848776"
-    stacks = ["io.buildpacks.stacks.bionic"]
-    uri = "https://artifacts.paketo.io/ruby/ruby_3.0.5_linux_x64_bionic_0de6dcac.tgz"
-    version = "3.0.5"
-
-  [[metadata.dependencies]]
-    checksum = "sha256:f2dbef7e3cd197b81de4f1a9493c16a51ab9dc62b1bbbcd52f48ce8b18c996a6"
-    cpe = "cpe:2.3:a:ruby-lang:ruby:3.0.6:*:*:*:*:*:*:*"
-    id = "ruby"
-    licenses = ["BSD-2-Clause", "BSD-2-Clause-NetBSD", "BSD-3-Clause", "BSD-3-Clause-No-Nuclear-License-2014", "Bison-exception-2.2", "FSFUL", "GPL-2.0-only", "GPL-2.0-or-later", "MIT", "MIT-0", "Ruby", "deprecated_GPL-2.0", "deprecated_GPL-2.0+"]
-    name = "Ruby"
-    purl = "pkg:generic/[email protected]?checksum=6e6cbd490030d7910c0ff20edefab4294dfcd1046f0f8f47f78b597987ac683e&download_url=https://cache.ruby-lang.org/pub/ruby/3.0/ruby-3.0.6.tar.gz"
-    source = "https://cache.ruby-lang.org/pub/ruby/3.0/ruby-3.0.6.tar.gz"
-    source-checksum = "sha256:6e6cbd490030d7910c0ff20edefab4294dfcd1046f0f8f47f78b597987ac683e"
-    stacks = ["io.buildpacks.stacks.bionic"]
-    uri = "https://artifacts.paketo.io/ruby/ruby_3.0.6_linux_x64_bionic_f2dbef7e.tgz"
-    version = "3.0.6"
-
   [[metadata.dependencies]]
     checksum = "sha256:a9c084d0785d047f9b2394cccfb16acd326654c74f201abd6d220eef386addca"
     cpe = "cpe:2.3:a:ruby-lang:ruby:3.1.3:*:*:*:*:*:*:*"
@@ -174,11 +148,6 @@ api = "0.7"
     uri = "https://artifacts.paketo.io/ruby/ruby_3.3.0_linux_x64_bionic_70d46d54.tgz"
     version = "3.3.0"
 
-  [[metadata.dependency-constraints]]
-    constraint = "3.0.*"
-    id = "ruby"
-    patches = 2
-
   [[metadata.dependency-constraints]]
     constraint = "3.1.*"
     id = "ruby"

integration/simple_app_test.go

@@ -78,41 +78,6 @@ func testSimpleApp(t *testing.T, context spec.G, it spec.S) {
 			Eventually(container).Should(Serve(MatchRegexp(`Hello from Ruby 3\.1\.\d+`)).OnPort(8080))
 		})
 
-		// This test is not currently applicable on jammy because currently Jammy support
-		// only applies to one version of Ruby (version 3.1 and above)
-		if builder.LocalInfo.Stack.ID != "io.buildpacks.stacks.jammy" {
-			context("using an older version of Ruby", func() {
-				it("pack builds and runs the app successfully", func() {
-					var err error
-					var logs fmt.Stringer
-
-					image, logs, err = pack.WithNoColor().Build.
-						WithPullPolicy("never").
-						WithBuildpacks(
-							settings.Buildpacks.MRI.Online,
-							settings.Buildpacks.BuildPlan.Online,
-						).
-						WithEnv(map[string]string{
-							"BP_MRI_VERSION": "3.0.*",
-							"BP_LOG_LEVEL":   "DEBUG",
-						}).
-						Execute(name, source)
-					Expect(err).ToNot(HaveOccurred(), logs.String)
-
-					container, err = docker.Container.Run.
-						WithCommand("ruby run.rb").
-						WithEnv(map[string]string{"PORT": "8080"}).
-						WithPublish("8080").
-						WithPublishAll().
-						Execute(image.ID)
-					Expect(err).NotTo(HaveOccurred())
-
-					Eventually(container).Should(BeAvailable(), logs.String())
-					Eventually(container).Should(Serve(MatchRegexp(`Hello from Ruby 3\.0\.\d+`)).OnPort(8080))
-				})
-			})
-		}
-
 		context("validating SBOM", func() {
 			var (
 				container2 occam.Container