Remove nsa statsd integration (replaced by OpenTelemetry) (#30240)

Gemfile.lock

@@ -455,11 +455,6 @@ GEM
     nokogiri (1.16.7)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nsa (0.3.0)
-      activesupport (>= 4.2, < 7.2)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      sidekiq (>= 3.5)
-      statsd-ruby (~> 1.4, >= 1.4.0)
     oj (3.16.5)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
@@ -821,7 +816,6 @@ GEM
     simplecov-lcov (0.8.0)
     simplecov_json_formatter (0.1.4)
     stackprof (0.2.26)
-    statsd-ruby (1.5.0)
     stoplight (4.1.0)
       redlock (~> 1.0)
     stringio (3.1.1)
@@ -980,7 +974,6 @@ DEPENDENCIES
   net-http (~> 0.4.0)
   net-ldap (~> 0.18)
   nokogiri (~> 1.15)
-  nsa
   oj (~> 3.14)
   omniauth (~> 2.0)
   omniauth-cas (~> 3.0.0.beta.1)