Autofix Rubocop Style/RedundantBegin (#23703)

app/validators/domain_validator.rb

@@ -4,13 +4,11 @@ class DomainValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     return if value.blank?
 
-    domain = begin
-      if options[:acct]
-        value.split('@').last
-      else
-        value
-      end
-    end
+    domain = if options[:acct]
+               value.split('@').last
+             else
+               value
+             end
 
     record.errors.add(attribute, I18n.t('domain_validator.invalid_domain')) unless compliant?(domain)
   end

app/validators/existing_username_validator.rb

@@ -4,16 +4,14 @@ class ExistingUsernameValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     return if value.blank?
 
-    usernames_and_domains = begin
-      value.split(',').map do |str|
-        username, domain = str.strip.gsub(/\A@/, '').split('@', 2)
-        domain = nil if TagManager.instance.local_domain?(domain)
+    usernames_and_domains = value.split(',').map do |str|
+      username, domain = str.strip.gsub(/\A@/, '').split('@', 2)
+      domain = nil if TagManager.instance.local_domain?(domain)
 
-        next if username.blank?
+      next if username.blank?
 
-        [str, username, domain]
-      end.compact
-    end
+      [str, username, domain]
+    end.compact
 
     usernames_with_no_accounts = usernames_and_domains.filter_map do |(str, username, domain)|
       str unless Account.find_remote(username, domain)

app/validators/import_validator.rb

@@ -35,13 +35,11 @@ class ImportValidator < ActiveModel::Validator
   def validate_following_import(import, row_count)
     base_limit = FollowLimitValidator.limit_for_account(import.account)
 
-    limit = begin
-      if import.overwrite?
-        base_limit
-      else
-        base_limit - import.account.following_count
-      end
-    end
+    limit = if import.overwrite?
+              base_limit
+            else
+              base_limit - import.account.following_count
+            end
 
     import.errors.add(:data, I18n.t('users.follow_limit_reached', limit: base_limit)) if row_count > limit
   end