ekump/remove 2.4 safe dup string code

.rubocop_todo.yml

@@ -42,7 +42,6 @@ Metrics/BlockNesting:
 Naming/FileName:
   Exclude:
     - 'lib/datadog/appsec/autoload.rb'
-    - 'lib/datadog/core/backport.rb'
     - 'lib/datadog/opentelemetry/api/trace/span.rb'
     - 'lib/datadog/opentelemetry/sdk/trace/span.rb'
     - 'lib/datadog/profiling/load_native_extension.rb'

lib/datadog/core/utils/safe_dup.rb

@@ -1,49 +1,37 @@
 # frozen_string_literal: true
 
-require_relative '../backport'
-
 module Datadog
   module Core
     module Utils
       # Helper methods for safer dup
       module SafeDup
         # String#+@ was introduced in Ruby 2.3
-        if String.method_defined?(:+@) && String.method_defined?(:-@)
-          def self.frozen_or_dup(v)
-            # For the case of a String we use the methods +@ and -@.
-            # Those methods are only for String objects
-            # they are faster and chepaer on the memory side.
-            # Check the benchmark on
-            # https://github.com/DataDog/dd-trace-rb/pull/2704
-            if v.is_a?(String)
-              # If the string is not frozen, the +(-v) will:
-              # - first create a frozen deduplicated copy with -v
-              # - then it will dup it more efficiently with +v
-              v.frozen? ? v : +(-v)
-            else
-              v.frozen? ? v : Core::BackportFrom24.dup(v)
-            end
-          end
-
-          def self.frozen_dup(v)
-            # For the case of a String we use the methods -@
-            # That method are only for String objects
-            # they are faster and chepaer on the memory side.
-            # Check the benchmark on
-            # https://github.com/DataDog/dd-trace-rb/pull/2704
-            if v.is_a?(String)
-              -v if v
-            else
-              v.frozen? ? v : Core::BackportFrom24.dup(v).freeze
-            end
-          end
-        else
-          def self.frozen_or_dup(v)
-            v.frozen? ? v : Core::BackportFrom24.dup(v)
+        def self.frozen_or_dup(v)
+          # For the case of a String we use the methods +@ and -@.
+          # Those methods are only for String objects
+          # they are faster and chepaer on the memory side.
+          # Check the benchmark on
+          # https://github.com/DataDog/dd-trace-rb/pull/2704
+          if v.is_a?(String)
+            # If the string is not frozen, the +(-v) will:
+            # - first create a frozen deduplicated copy with -v
+            # - then it will dup it more efficiently with +v
+            v.frozen? ? v : +(-v)
+          else
+            v.frozen? ? v : v.dup
           end
+        end
 
-          def self.frozen_dup(v)
-            v.frozen? ? v : Core::BackportFrom24.dup(v).freeze
+        def self.frozen_dup(v)
+          # For the case of a String we use the methods -@
+          # That method are only for String objects
+          # they are faster and chepaer on the memory side.
+          # Check the benchmark on
+          # https://github.com/DataDog/dd-trace-rb/pull/2704
+          if v.is_a?(String)
+            -v if v
+          else
+            v.frozen? ? v : v.dup.freeze
           end
         end
       end

lib/datadog/tracing/contrib/rack/middlewares.rb

@@ -3,7 +3,6 @@
 require 'date'
 
 require_relative '../../../core/environment/variable_helpers'
-require_relative '../../../core/backport'
 require_relative '../../../core/remote/tie/tracing'
 require_relative '../../client_ip'
 require_relative '../../metadata/ext'
@@ -252,7 +251,7 @@ def parse_url(env, original_env)
                        else
                          # normally REQUEST_URI starts at the path, but it
                          # might contain the full URL in some cases (e.g WEBrick)
-                         Datadog::Core::BackportFrom25.string_delete_prefix(request_uri, base_url)
+                         request_uri.delete_prefix(base_url)
                        end
 
             base_url + fullpath

lib/datadog/tracing/sampling/rule_sampler.rb

@@ -65,7 +65,7 @@ def self.parse(rules, rate_limit, default_sample_rate)
               sample_rate: sample_rate,
             }
 
-            Core::BackportFrom24.hash_compact!(kwargs)
+            kwargs.compact!
 
             SimpleRule.new(**kwargs)
           end