Remove derailed_benchmarks dependency (#12861)

Gemfile

@@ -147,7 +147,6 @@ group :development do
   gem 'capistrano-rbenv', '~> 2.1'
   gem 'capistrano-yarn', '~> 2.0'
 
-  gem 'derailed_benchmarks'
   gem 'stackprof'
 end
 

Gemfile.lock

@@ -108,7 +108,6 @@ GEM
     aws-sigv4 (1.1.0)
       aws-eventstream (~> 1.0, >= 1.0.2)
     bcrypt (3.1.12)
-    benchmark-ips (2.7.2)
     better_errors (2.5.1)
       coderay (>= 1.0.0)
       erubi (>= 1.0.0)
@@ -175,15 +174,6 @@ GEM
     css_parser (1.7.1)
       addressable
     debug_inspector (0.0.3)
-    derailed_benchmarks (1.4.3)
-      benchmark-ips (~> 2)
-      get_process_mem (~> 0)
-      heapy (~> 0)
-      memory_profiler (~> 0)
-      rack (>= 1)
-      rake (> 10, < 14)
-      ruby-statistics (>= 2.1)
-      thor (~> 0.19)
     devise (4.7.1)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -257,8 +247,6 @@ GEM
     fuubar (2.5.0)
       rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)
-    get_process_mem (0.2.5)
-      ffi (~> 1.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     goldfinger (2.1.1)
@@ -279,7 +267,6 @@ GEM
       concurrent-ruby (~> 1.0)
     hashdiff (1.0.0)
     hashie (3.6.0)
-    heapy (0.1.4)
     highline (2.0.1)
     hiredis (0.6.3)
     hkdf (0.3.0)
@@ -569,7 +556,6 @@ GEM
     ruby-progressbar (1.10.1)
     ruby-saml (1.9.0)
       nokogiri (>= 1.5.10)
-    ruby-statistics (2.1.1)
     rufus-scheduler (3.5.2)
       fugit (~> 1.1, >= 1.1.5)
     safe_yaml (1.0.5)
@@ -701,7 +687,6 @@ DEPENDENCIES
   climate_control (~> 0.2)
   concurrent-ruby
   connection_pool
-  derailed_benchmarks
   devise (~> 4.7)
   devise-two-factor (~> 3.1)
   devise_pam_authenticatable2 (~> 9.2)