fix: Make the unmaintained versions of rdkafka-ruby unsupported

Author: joker1007

instrumentation/rdkafka/Appraisals

@@ -4,7 +4,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-%w[0.12.0 0.13.0 0.14.0 0.15.0 0.16.0 0.17.0 0.18.0 0.19.0 0.20.0 0.21.0].each do |version|
+%w[0.18.0 0.19.0 0.20.0 0.21.0].each do |version|
   appraise "rdkafka-#{version}" do
     gem 'rdkafka', "~> #{version}"
   end

instrumentation/rdkafka/lib/opentelemetry/instrumentation/rdkafka/instrumentation.rb

@@ -11,7 +11,7 @@ module Rdkafka
       class Instrumentation < OpenTelemetry::Instrumentation::Base
         compatible do
           gem_version = Gem::Version.new(::Rdkafka::VERSION)
-          Gem::Requirement.new('>= 0.10.0').satisfied_by?(gem_version)
+          Gem::Requirement.new('>= 0.18.0').satisfied_by?(gem_version)
         end
 
         install do |_config|

instrumentation/rdkafka/lib/opentelemetry/instrumentation/rdkafka/patches/consumer.rb

@@ -10,11 +10,7 @@ module Rdkafka
       module Patches
         # The Consumer module contains the instrumentation patch for the Consumer class
         module Consumer
-          GETTER = if Gem::Version.new(::Rdkafka::VERSION) >= Gem::Version.new('0.13.0')
-                     Context::Propagation.text_map_getter
-                   else
-                     OpenTelemetry::Common::Propagation.symbol_key_getter
-                   end
+          GETTER = Context::Propagation.text_map_getter
           private_constant :GETTER
 
           def each