Resolve Performance/DeletePrefix rubocop offenses

Changelog: other
EE: true

app/helpers/submodule_helper.rb

@@ -30,7 +30,7 @@ module SubmoduleHelper
         end
       end
 
-      namespace.sub!(%r{\A/}, '')
+      namespace.delete_prefix!('/')
       project.rstrip!
       project.delete_suffix!('.git')
 

ee/lib/gitlab/geo/git_ssh_proxy.rb

@@ -173,7 +173,7 @@ module Gitlab
       # https://git-scm.com/book/en/v2/Git-Internals-Transfer-Protocols
       #
       def remove_upload_pack_http_service_fragment_from(body)
-        body.gsub(/\A001e# service=git-upload-pack\n0000/, '')
+        body.delete_prefix("001e# service=git-upload-pack\n0000")
       end
 
       # See Uploading Data > HTTP(S) section at:
@@ -195,7 +195,7 @@ module Gitlab
       # https://git-scm.com/book/en/v2/Git-Internals-Transfer-Protocols
       #
       def remove_receive_pack_http_service_fragment_from(body)
-        body.gsub(/\A001f# service=git-receive-pack\n0000/, '')
+        body.delete_prefix("001f# service=git-receive-pack\n0000")
       end
 
       def ensure_secondary!

lib/banzai/filter/repository_link_filter.rb

@@ -180,7 +180,7 @@ module Banzai
 
         parts.pop if uri_type(request_path) != :tree
 
-        path.sub!(%r{\A\./}, '')
+        path.delete_prefix!('./')
 
         while path.start_with?('../')
           parts.pop

lib/gitlab/auth/ldap/dn.rb

@@ -30,7 +30,7 @@ module Gitlab
         def self.normalize_value(given_value)
           dummy_dn = "placeholder=#{given_value}"
           normalized_dn = new(*dummy_dn).to_normalized_s
-          normalized_dn.sub(/\Aplaceholder=/, '')
+          normalized_dn.delete_prefix('placeholder=')
         end
 
         ##

lib/gitlab/gfm/uploads_rewriter.rb

@@ -37,7 +37,7 @@ module Gitlab
           if was_embedded?(markdown)
             moved_markdown
           else
-            moved_markdown.sub(/\A!/, "")
+            moved_markdown.delete_prefix('!')
           end
         end
       end

lib/gitlab/git/ref.rb

@@ -24,7 +24,7 @@ module Gitlab
       # Ex.
       #   Ref.extract_branch_name('refs/heads/master') #=> 'master'
       def self.extract_branch_name(str)
-        str.gsub(%r{\Arefs/heads/}, '')
+        str.delete_prefix('refs/heads/')
       end
 
       def initialize(repository, name, target, dereferenced_target)

lib/gitlab/project_template.rb

@@ -29,7 +29,7 @@ module Gitlab
     end
 
     def project_path
-      URI.parse(preview).path.sub(%r{\A/}, '')
+      URI.parse(preview).path.delete_prefix('/')
     end
 
     def uri_encoded_project_path

lib/gitlab/setup_helper.rb

@@ -98,7 +98,7 @@ module Gitlab
             storages << { name: key, path: storage_paths[key] }
           end
 
-          config = { socket_path: address.sub(/\Aunix:/, '') }
+          config = { socket_path: address.delete_prefix('unix:') }
 
           if Rails.env.test?
             socket_filename = options[:gitaly_socket] || "gitaly.socket"

lib/gitlab/time_tracking_formatter.rb

@@ -8,7 +8,8 @@ module Gitlab
     CUSTOM_DAY_AND_MONTH_LENGTH = { hours_per_day: 8, days_per_month: 20 }.freeze
 
     def parse(string)
-      string = string.sub(/\A-/, '')
+      negative_time = string.start_with?('-')
+      string = string.delete_prefix('-')
 
       seconds =
         begin
@@ -19,7 +20,7 @@ module Gitlab
           nil
         end
 
-      seconds *= -1 if seconds && Regexp.last_match
+      seconds *= -1 if seconds && negative_time
       seconds
     end
 

spec/controllers/projects/artifacts_controller_spec.rb

@@ -339,7 +339,7 @@ RSpec.describe Projects::ArtifactsController do
 
         def params
           @params ||= begin
-            base64_params = send_data.sub(/\Aartifacts\-entry:/, '')
+            base64_params = send_data.delete_prefix('artifacts-entry:')
             Gitlab::Json.parse(Base64.urlsafe_decode64(base64_params))
           end
         end

spec/lib/gitlab/gfm/uploads_rewriter_spec.rb

@@ -67,7 +67,7 @@ RSpec.describe Gitlab::Gfm::UploadsRewriter do
 
     it 'does not rewrite plain links as embedded' do
       embedded_link = image_uploader.markdown_link
-      plain_image_link = embedded_link.sub(/\A!/, "")
+      plain_image_link = embedded_link.delete_prefix('!')
       text = "#{plain_image_link} and #{embedded_link}"
 
       moved_text = described_class.new(text, old_project, user).rewrite(new_project)