refactor: clean up documentation and remove unnecessary whitespace in GlobalField class

Author: harshithad0703

src/main/java/com/contentstack/sdk/GlobalField.java

@@ -9,12 +9,8 @@
 import java.util.logging.Logger;
 
 /**
- * <a href=
- * "https://www.contentstack.com/docs/developers/apis/content-delivery-api/#single-content-type">ContentType</a>
- * This
- * call returns information of a specific global field. It returns the global
- * field schema, but does not include its
- * entries.
+ * This call returns information of a specific global field. It returns the
+ * global field schema.
  *
  */
 public class GlobalField {
@@ -63,6 +59,7 @@ public void removeHeader(String headerKey) {
             this.headers.remove(headerKey);
         }
     }
+
     /**
      * Fetch.
      *
@@ -103,7 +100,6 @@ private void fetchGlobalFields(String urlString, JSONObject params, HashMap<Stri
         }
     }
 
-
     private HashMap<String, Object> getUrlParams(JSONObject urlQueriesJSON) {
         HashMap<String, Object> hashMap = new HashMap<>();
         if (urlQueriesJSON != null && urlQueriesJSON.length() > 0) {