More rubocop appeasing

Author: ldmosquera

lib/ruby_llm/provider.rb

@@ -139,7 +139,7 @@ def to_json_stream(&block) # rubocop:disable Metrics/MethodLength
               parsed_data = JSON.parse(chunk)
               block.call(parsed_data)
             else
-              raise NotImplementedError.new("unsupported content-type in streaming response: #{content_type}")
+              raise NotImplementedError, "unsupported content-type in streaming response: #{content_type}"
             end
           end
         end

lib/ruby_llm/providers/ollama/chat.rb

@@ -7,7 +7,7 @@ module Ollama
       module Chat # rubocop:disable Metrics/ModuleLength
         # Must be public for Provider to use
         def complete(messages, tools:, temperature:, model:, &block) # rubocop:disable Metrics/MethodLength
-          raise NotImplementedError.new('tool use not implemented in Ollama at this time') if tools.any?
+          raise NotImplementedError, 'tool use not implemented in Ollama at this time' if tools.any?
 
           payload = {
             model: model,
@@ -45,14 +45,8 @@ def format_messages(messages)
         end
 
         def format_role(role)
-          case role
-          when :assistant
-          when :system
-          when :tool
-            role.to_s
           # FIXME: probably should validate this
-          else role.to_s
-          end
+          role.to_s
         end
 
         def format_parts(msg) # rubocop:disable Metrics/AbcSize,Metrics/MethodLength

lib/ruby_llm/providers/ollama/embeddings.rb

@@ -28,8 +28,9 @@ def embed(text, model:) # rubocop:disable Metrics/AbcSize,Metrics/MethodLength
         def format_text_for_embedding(text)
           # Ollama supports either a string or a string array here
           unless text.is_a?(Array) || text.is_a?(String)
-            raise NotImplementedException.new("unsupported argument for Ollama embedding: #{text.class}")
+            raise NotImplementedException, "unsupported argument for Ollama embedding: #{text.class}"
           end
+
           text
         end
       end