Remove get_build method for find_by_id

The original intention of `get_build` was as a workaround not to violate
`CodeReuse/ActiveRecord`. `find_by_id` does the exact same thing but
does not violate the rubocop rule.

app/controllers/projects/artifacts_controller.rb

@@ -86,7 +86,7 @@ class Projects::ArtifactsController < Projects::ApplicationController
   end
 
   def build_from_id
-    project.get_build(params[:job_id]) if params[:job_id]
+    project.builds.find_by_id(params[:job_id]) if params[:job_id]
   end
 
   def build_from_ref

app/controllers/projects/build_artifacts_controller.rb

@@ -45,7 +45,7 @@ class Projects::BuildArtifactsController < Projects::ApplicationController
   end
 
   def job_from_id
-    project.get_build(params[:build_id]) if params[:build_id]
+    project.builds.find_by_id(params[:build_id]) if params[:build_id]
   end
 
   def job_from_ref

app/models/project.rb

@@ -658,10 +658,6 @@ class Project < ActiveRecord::Base
     latest_successful_build_for(job_name, ref) || raise(ActiveRecord::RecordNotFound.new("Couldn't find job #{job_name}"))
   end
 
-  def get_build(id)
-    builds.find_by(id: id)
-  end
-
   def merge_base_commit(first_commit_id, second_commit_id)
     sha = repository.merge_base(first_commit_id, second_commit_id)
     commit_by(oid: sha) if sha

spec/models/project_spec.rb

@@ -2026,29 +2026,6 @@ describe Project do
     end
   end
 
-  describe '#get_build' do
-    let(:project) { create(:project, :repository) }
-    let(:ci_pipeline) { create(:ci_pipeline, project: project) }
-
-    context 'when build exists' do
-      context 'build is associated with project' do
-        let(:build) { create(:ci_build, :success, pipeline: ci_pipeline) }
-
-        it { expect(project.get_build(build.id)).to eq(build) }
-      end
-
-      context 'build is not associated with project' do
-        let(:build) { create(:ci_build, :success) }
-
-        it { expect(project.get_build(build.id)).to be_nil }
-      end
-    end
-
-    context 'build does not exists' do
-      it { expect(project.get_build(rand 100)).to be_nil }
-    end
-  end
-
   describe '#import_status' do
     context 'with import_state' do
       it 'returns the right status' do