Updating samples for Java Feign performance betterment changes

Author: sushma3690

samples/client/petstore/java/feign-no-nullable/src/main/java/org/openapitools/client/ApiClient.java

@@ -19,7 +19,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import feign.okhttp.OkHttpClient;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
@@ -59,7 +58,6 @@ public ApiClient() {
     apiAuthorizations = new LinkedHashMap<String, RequestInterceptor>();
     objectMapper = createObjectMapper();
     feignBuilder = Feign.builder()
-                .client(new OkHttpClient())
                 .encoder(new FormEncoder(new JacksonEncoder(objectMapper)))
                 .decoder(new ApiResponseDecoder(objectMapper))
                 .errorDecoder(new ApiErrorDecoder())

samples/client/petstore/java/feign/src/main/java/org/openapitools/client/ApiClient.java

@@ -19,7 +19,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import feign.okhttp.OkHttpClient;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
@@ -60,7 +59,6 @@ public ApiClient() {
     apiAuthorizations = new LinkedHashMap<String, RequestInterceptor>();
     objectMapper = createObjectMapper();
     feignBuilder = Feign.builder()
-                .client(new OkHttpClient())
                 .encoder(new FormEncoder(new JacksonEncoder(objectMapper)))
                 .decoder(new ApiResponseDecoder(objectMapper))
                 .errorDecoder(new ApiErrorDecoder())