Remove beta ecosystems feature flag for sbt (#15151)

* handle pubspec validation errors gracefully

* remove check for beta ecosystems for sbt ga

Author: AbhishekBhaskar

sbt/lib/dependabot/sbt/file_fetcher.rb

@@ -31,14 +31,6 @@ def self.required_files_message
 
       sig { override.returns(T::Array[DependencyFile]) }
       def fetch_files
-        unless allow_beta_ecosystems?
-          raise Dependabot::DependencyFileNotFound.new(
-            nil,
-            "Sbt support is currently in beta. Enable the beta ecosystems experiment to use it " \
-            "(for example, run bin/dry-run.rb --enable-beta-ecosystems)."
-          )
-        end
-
         fetched_files = T.let([], T::Array[DependencyFile])
 
         fetched_files << build_sbt

sbt/spec/dependabot/sbt/file_fetcher_spec.rb

@@ -34,7 +34,6 @@
 
   before do
     allow(file_fetcher_instance).to receive(:commit).and_return("sha")
-    Dependabot::Experiments.register(:enable_beta_ecosystems, true)
   end
 
   it_behaves_like "a dependency file fetcher"
@@ -204,15 +203,4 @@
         .to match_array(%w(build.sbt project/build.properties core/build.sbt))
     end
   end
-
-  context "when beta ecosystems are not enabled" do
-    before do
-      Dependabot::Experiments.register(:enable_beta_ecosystems, false)
-    end
-
-    it "raises a DependencyFileNotFound error" do
-      expect { file_fetcher_instance.files }
-        .to raise_error(Dependabot::DependencyFileNotFound)
-    end
-  end
 end