diff --git a/lib/new_relic/agent/datastores/metric_helper.rb b/lib/new_relic/agent/datastores/metric_helper.rb
index 5a8aca85a1..8a93cb78c3 100644
--- a/lib/new_relic/agent/datastores/metric_helper.rb
+++ b/lib/new_relic/agent/datastores/metric_helper.rb
@@ -8,9 +8,6 @@ module Agent
     module Datastores
       module MetricHelper
         ROLLUP_METRIC = "Datastore/all".freeze
-        WEB_ROLLUP_METRIC = "Datastore/allWeb".freeze
-        OTHER_ROLLUP_METRIC = "Datastore/allOther".freeze
-        DEFAULT_PRODUCT_NAME = "ActiveRecord".freeze
         OTHER = "Other".freeze
 
         ALL = "all".freeze
diff --git a/lib/new_relic/agent/datastores/mongo/metric_translator.rb b/lib/new_relic/agent/datastores/mongo/metric_translator.rb
index 364e5829f9..077b3cfb8a 100644
--- a/lib/new_relic/agent/datastores/mongo/metric_translator.rb
+++ b/lib/new_relic/agent/datastores/mongo/metric_translator.rb
@@ -58,8 +58,6 @@ def self.operation_and_collection_for(name, payload)
             nil
           end
 
-          MONGO_PRODUCT_NAME = "MongoDB".freeze
-
           def self.collection_in_selector?(payload)
             payload[:collection] == '$cmd' && payload[:selector]
           end
diff --git a/lib/new_relic/agent/distributed_tracing/distributed_trace_payload.rb b/lib/new_relic/agent/distributed_tracing/distributed_trace_payload.rb
index af97a2266b..c4fbb75701 100644
--- a/lib/new_relic/agent/distributed_tracing/distributed_trace_payload.rb
+++ b/lib/new_relic/agent/distributed_tracing/distributed_trace_payload.rb
@@ -19,7 +19,6 @@ class DistributedTracePayload
 
       VERSION = [0, 1].freeze
       PARENT_TYPE = "App"
-      POUND = '#'
 
       # Key names for serialization
       VERSION_KEY = 'v'
diff --git a/lib/new_relic/agent/instrumentation/queue_time.rb b/lib/new_relic/agent/instrumentation/queue_time.rb
index 841b335ed1..ecda87b40d 100644
--- a/lib/new_relic/agent/instrumentation/queue_time.rb
+++ b/lib/new_relic/agent/instrumentation/queue_time.rb
@@ -13,7 +13,6 @@ module QueueTime
         REQUEST_START_HEADER = 'HTTP_X_REQUEST_START'.freeze
         QUEUE_START_HEADER = 'HTTP_X_QUEUE_START'.freeze
         MIDDLEWARE_START_HEADER = 'HTTP_X_MIDDLEWARE_START'.freeze
-        ALL_QUEUE_METRIC = 'WebFrontend/QueueTime'.freeze
         # any timestamps before this are thrown out and the parser
         # will try again with a larger unit (2000/1/1 UTC)
         EARLIEST_ACCEPTABLE_TIME = Time.at(946684800).to_f
diff --git a/lib/new_relic/agent/span_event_primitive.rb b/lib/new_relic/agent/span_event_primitive.rb
index 0ba68fc22a..be7bb2bf73 100644
--- a/lib/new_relic/agent/span_event_primitive.rb
+++ b/lib/new_relic/agent/span_event_primitive.rb
@@ -21,7 +21,6 @@ module SpanEventPrimitive
       TRACE_ID_KEY = 'traceId'
       GUID_KEY = 'guid'
       PARENT_ID_KEY = 'parentId'
-      GRANDPARENT_ID_KEY = 'grandparentId'
       TRANSACTION_ID_KEY = 'transactionId'
       SAMPLED_KEY = 'sampled'
       PRIORITY_KEY = 'priority'
diff --git a/lib/new_relic/agent/transaction.rb b/lib/new_relic/agent/transaction.rb
index 08b63cbe4c..f4a3999071 100644
--- a/lib/new_relic/agent/transaction.rb
+++ b/lib/new_relic/agent/transaction.rb
@@ -37,7 +37,6 @@ class Transaction
       ACTION_CABLE_PREFIX = "#{CONTROLLER_PREFIX}ActionCable/"
 
       WEB_TRANSACTION_CATEGORIES = [:web, :controller, :uri, :rack, :sinatra, :grape, :middleware, :action_cable].freeze
-      TRANSACTION_NAMING_SOURCES = [:child, :api].freeze
 
       MIDDLEWARE_SUMMARY_METRICS = ["Middleware/all"].freeze
       WEB_SUMMARY_METRIC = "HttpDispatcher"
diff --git a/lib/new_relic/agent/transaction/transaction_sample_buffer.rb b/lib/new_relic/agent/transaction/transaction_sample_buffer.rb
index 55f4b71e28..8d256d240a 100644
--- a/lib/new_relic/agent/transaction/transaction_sample_buffer.rb
+++ b/lib/new_relic/agent/transaction/transaction_sample_buffer.rb
@@ -10,7 +10,6 @@ class TransactionSampleBuffer
         attr_reader :samples
 
         SINGLE_BUFFER_MAX = 20
-        NO_SAMPLES = NewRelic::EMPTY_ARRAY
 
         def initialize
           @samples = []