Remove newrelic_grape gem since the New Relic gem now provides native support:

https://docs.newrelic.com/docs/agents/ruby-agent/frameworks/grape-instrumentation

Gemfile

@@ -300,7 +300,6 @@ group :production do
 end
 
 gem "newrelic_rpm", '~> 3.14'
-gem 'newrelic-grape'
 
 gem 'octokit', '~> 3.8.0'
 

Gemfile.lock

@@ -478,9 +478,6 @@ GEM
     net-ldap (0.12.1)
     net-ssh (3.0.1)
     netrc (0.11.0)
-    newrelic-grape (2.1.0)
-      grape
-      newrelic_rpm
     newrelic_rpm (3.14.1.311)
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
@@ -960,7 +957,6 @@ DEPENDENCIES
   mysql2 (~> 0.3.16)
   nested_form (~> 0.3.2)
   net-ssh (~> 3.0.1)
-  newrelic-grape
   newrelic_rpm (~> 3.14)
   nokogiri (= 1.6.7.2)
   nprogress-rails (~> 0.1.6.7)