removed json and omniauth gems

Gemfile

@@ -20,7 +20,7 @@ gem 'turbolinks'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.0'
 # bundle exec rake doc:rails generates the API under doc/api.
-gem 'sdoc', '~> 0.4.0', group: :doc
+#gem 'sdoc', '~> 0.4.0', group: :doc
 
 # revert from 3.1.13 due to armhf bug
 gem 'bcrypt', '3.1.12'

Gemfile.lock

@@ -199,7 +199,6 @@ GEM
       guard (~> 2.0)
       rubocop (< 2.0)
     hashdiff (1.0.1)
-    hashie (4.1.0)
     http-accept (1.7.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
@@ -214,7 +213,6 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.6)
     listen (3.4.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -255,10 +253,6 @@ GEM
       nenv (~> 0.1)
       shellany (~> 0.0)
     oj (3.11.2)
-    omniauth (2.0.2)
-      hashie (>= 3.4.6)
-      rack (>= 1.6.2, < 3)
-      rack-protection
     orm_adapter (0.5.0)
     parallel (1.20.1)
     parser (3.0.0.0)
@@ -278,8 +272,6 @@ GEM
     rack (2.2.3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
-    rack-protection (2.1.0)
-      rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (6.0.3.4)
@@ -313,7 +305,6 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdoc (4.3.0)
     regexp_parser (2.0.3)
     responders (3.0.1)
       actionpack (>= 5.0)
@@ -378,9 +369,6 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sdoc (0.4.2)
-      json (~> 1.7, >= 1.7.7)
-      rdoc (~> 4.0)
     shellany (0.0.1)
     simplecov (0.21.2)
       docile (~> 1.1)
@@ -484,7 +472,6 @@ DEPENDENCIES
   jquery-rails
   mini_magick
   oj
-  omniauth
   pg
   rack-cors
   rails (~> 6.0)
@@ -493,7 +480,6 @@ DEPENDENCIES
   rubocop
   rubocop-rspec
   sass-rails (~> 5.0)
-  sdoc (~> 0.4.0)
   simplecov
   simplecov-console
   spring