Remove webp-ffi gem because wrappers are useless (part 2)

Author: janwerkhoven

Gemfile.lock

@@ -96,9 +96,6 @@ GEM
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
     ffi (1.15.0)
-    ffi-compiler (1.0.1)
-      ffi (>= 1.0.0)
-      rake
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     i18n (1.8.9)
@@ -206,9 +203,6 @@ GEM
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.0.0)
     uniform_notifier (1.16.0)
-    webp-ffi (0.4.0)
-      ffi (>= 1.9.0)
-      ffi-compiler (>= 0.1.2)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -240,7 +234,6 @@ DEPENDENCIES
   rubocop
   rubocop-rails
   seedbank
-  webp-ffi
   yaml_db
 
 RUBY VERSION