Remove Deprecated Methods (#1906)

Author: hyperxpro

client/src/main/java/org/asynchttpclient/Request.java

@@ -186,7 +186,6 @@ public interface Request {
     /**
      * @return a new request builder using this request as a prototype
      */
-    @SuppressWarnings("deprecation")
     default RequestBuilder toBuilder() {
         return new RequestBuilder(this);
     }

client/src/main/java/org/asynchttpclient/RequestBuilder.java

@@ -39,16 +39,7 @@ public RequestBuilder(String method, boolean disableUrlEncoding, boolean validat
         super(method, disableUrlEncoding, validateHeaders);
     }
 
-    /**
-     * @deprecated Use request.toBuilder() instead
-     */
-    @Deprecated
-    public RequestBuilder(Request prototype) {
+    RequestBuilder(Request prototype) {
         super(prototype);
     }
-
-    @Deprecated
-    public RequestBuilder(Request prototype, boolean disableUrlEncoding, boolean validateHeaders) {
-        super(prototype, disableUrlEncoding, validateHeaders);
-    }
 }