Remove thin

Gemfile

@@ -261,8 +261,6 @@ group :development do
 end
 
 group :development, :test do
-  gem 'thin', '~> 1.7.2'
-
   # Require factory_bot for usage with openproject plugins testing
   gem 'factory_bot', '~> 6.1.0'
   # require factory_bot_rails for convenience in core development

Gemfile.lock

@@ -897,10 +897,6 @@ GEM
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     test-prof (0.12.2)
-    thin (1.7.2)
-      daemons (~> 1.0, >= 1.0.9)
-      eventmachine (~> 1.0, >= 1.0.4)
-      rack (>= 1, < 3)
     thor (1.0.1)
     thread_safe (0.3.6)
     tilt (2.0.10)
@@ -1110,7 +1106,6 @@ DEPENDENCIES
   sys-filesystem (~> 1.3.3)
   table_print (~> 1.5.6)
   test-prof (~> 0.12.0)
-  thin (~> 1.7.2)
   timecop (~> 0.9.0)
   typed_dag (~> 2.0.2)
   tzinfo-data (~> 1.2020.1)