Fix custom objects API to preserve backward compatibility

Reference:
- [kubernetes-client#866](kubernetes-client#866)
- [kubernetes-client#959](kubernetes-client#959)

Signed-off-by: Nabarun Pal <pal.nabarun95@gmail.com>

kubernetes/client/api/custom_objects_api.py

@@ -2425,7 +2425,7 @@ def patch_cluster_custom_object_with_http_info(self, group, version, plural, nam
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json-patch+json', 'application/merge-patch+json'])  # noqa: E501
+            ['application/merge-patch+json'])  # noqa: E501
 
         # Authentication setting
         auth_settings = ['BearerToken']  # noqa: E501
@@ -2594,7 +2594,7 @@ def patch_cluster_custom_object_scale_with_http_info(self, group, version, plura
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json-patch+json', 'application/merge-patch+json'])  # noqa: E501
+            ['application/merge-patch+json'])  # noqa: E501
 
         # Authentication setting
         auth_settings = ['BearerToken']  # noqa: E501
@@ -2763,7 +2763,7 @@ def patch_cluster_custom_object_status_with_http_info(self, group, version, plur
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json-patch+json', 'application/merge-patch+json'])  # noqa: E501
+            ['application/merge-patch+json'])  # noqa: E501
 
         # Authentication setting
         auth_settings = ['BearerToken']  # noqa: E501
@@ -2941,7 +2941,7 @@ def patch_namespaced_custom_object_with_http_info(self, group, version, namespac
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json-patch+json', 'application/merge-patch+json'])  # noqa: E501
+            ['application/merge-patch+json'])  # noqa: E501
 
         # Authentication setting
         auth_settings = ['BearerToken']  # noqa: E501
@@ -3119,7 +3119,7 @@ def patch_namespaced_custom_object_scale_with_http_info(self, group, version, na
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json-patch+json', 'application/merge-patch+json', 'application/apply-patch+yaml'])  # noqa: E501
+            ['application/merge-patch+json'])  # noqa: E501
 
         # Authentication setting
         auth_settings = ['BearerToken']  # noqa: E501
@@ -3297,7 +3297,7 @@ def patch_namespaced_custom_object_status_with_http_info(self, group, version, n
 
         # HTTP header `Content-Type`
         header_params['Content-Type'] = self.api_client.select_header_content_type(  # noqa: E501
-            ['application/json-patch+json', 'application/merge-patch+json', 'application/apply-patch+yaml'])  # noqa: E501
+            ['application/merge-patch+json'])  # noqa: E501
 
         # Authentication setting
         auth_settings = ['BearerToken']  # noqa: E501