Update README.md

Removed reference to OBE pdf.

Author: bios62

security/security-design/shared-assets/iam-py-sdk/README.md

@@ -9,7 +9,7 @@ The example builds on an earlier Oracle By Example post, and the download of the
 
 The example has been updated to Python 3.0 and PyJWT 2.x.  
 
-The instructions is based on [Use Oracle Identity Cloud Service's Software Development Kit (SDK) for Authentication in Python Web Applications](https://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/idcs/idcs_python_sdk_obe/idcs-python-sdk.html) or [Use_OCI_IAM_Domain_SDK_for_Authn.pdf](files/Use_OCI_IAM_Domain_SDK_for_Authn.pdf) but note the changes below. 
+The instructions is based on [Use Oracle Identity Cloud Service's Software Development Kit (SDK) for Authentication in Python Web Applications](https://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/idcs/idcs_python_sdk_obe/idcs-python-sdk.html) but note the changes below. 
 
 Also consult the README.md in the [git repo](https://github.com/oracle-samples/idm-samples/tree/master/idcs-sdk-sample-apps/python/sampleapp) for details on the sampleapp.