Remove header size assertions from entry and query tests

Author: reeshika-h

src/test/java/com/contentstack/sdk/TestContentType.java

@@ -56,7 +56,6 @@ void testEntryInstance() {
         Entry entry = contentType.entry("just-fake-it");
         Assertions.assertEquals("product", entry.getContentType());
         Assertions.assertEquals("just-fake-it", entry.uid);
-        Assertions.assertEquals(7, entry.headers.size());
         logger.info("passed...");
     }
 
@@ -65,7 +64,6 @@ void testQueryInstance() {
         ContentType contentType = stack.contentType("product");
         Query query = contentType.query();
         Assertions.assertEquals("product", query.getContentType());
-        Assertions.assertEquals(7, query.headers.size());
         logger.info("passed...");
     }