diff --git a/app/models/repository.rb b/app/models/repository.rb
index bc570f2f8..80142739d 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -186,11 +186,6 @@ class Repository < ActiveRecord::Base
     scm.supports_annotate?
   end
 
-  def supports_all_revisions?
-    ActiveSupport::Deprecation.warn 'Repository#supports_all_revisions? is deprecated and will be removed in Redmine 6.0. Please use #supports_history instead.'
-    supports_history?
-  end
-
   def supports_history?
     true
   end
diff --git a/lib/redmine/scm/adapters/abstract_adapter.rb b/lib/redmine/scm/adapters/abstract_adapter.rb
index 8e74086c5..0baf2962c 100644
--- a/lib/redmine/scm/adapters/abstract_adapter.rb
+++ b/lib/redmine/scm/adapters/abstract_adapter.rb
@@ -167,12 +167,6 @@ module Redmine
           path.end_with?('/') ? path : "#{path}/"
         end
 
-        def with_trailling_slash(path)
-          ActiveSupport::Deprecation.warn 'Redmine::Scm::Adapters::AbstractAdapter#with_trailling_slash is ' \
-           'deprecated and will be removed in Redmine 6.0. Please use #with_trailing_slash instead.'
-          with_trailing_slash(path)
-        end
-
         def without_leading_slash(path)
           path ||= ''
           path.gsub(%r{^/+}, '')
@@ -183,12 +177,6 @@ module Redmine
           path.end_with?('/') ? path[0..-2] : path
         end
 
-        def without_trailling_slash(path)
-          ActiveSupport::Deprecation.warn 'Redmine::Scm::Adapters::AbstractAdapter#without_trailling_slash is ' \
-          'deprecated and will be removed in Redmine 6.0. Please use #without_trailing_slash instead.'
-          without_trailing_slash(path)
-        end
-
         def valid_name?(name)
           return true if name.nil?
           return true if name.is_a?(Integer) && name > 0