Grafana UI: Fix alignment issue with http method dropdown (#56592)

- Removed custom width prop from the http method Select component to fix the alignment issue for prometheus HTTP request type dropdown

public/app/plugins/datasource/prometheus/configuration/PromSettings.tsx

@@ -89,7 +89,6 @@ export const PromSettings = (props: Props) => {
             options={httpOptions}
             value={httpOptions.find((o) => o.value === options.jsonData.httpMethod)}
             onChange={onChangeHandler('httpMethod', options, onOptionsChange)}
-            width={7}
           />
         </div>
       </div>