ISSUE-232---drop-mmh3-dependency

README.md

@@ -33,9 +33,15 @@ To install:
     pip install optimizely-sdk
 
 Note:  
-If you are running the SDK with PyPy or PyPy3 and you are experiencing issues, install this cryptography package **first** and then optimizely-sdk package:  
+- If you are running the SDK with PyPy or PyPy3 and you are experiencing issues, install this cryptography package **first** and then optimizely-sdk package:  
 
-    pip install "cryptography>=1.3.4,<=3.1.1"
+    ```pip install "cryptography>=1.3.4,<=3.1.1"```
+
+
+- After v3.0.0 mmh3 is no longer a mandatory dependency to removed to remove the c++ build requirement.
+If you are experiencing (performance) problems, install this explicitly and it will continue to be honoured by code:
+
+     ```pip install "mmh3==2.5.1"```
 
 ### Feature Management Access
 
@@ -230,4 +236,4 @@ This software incorporates code from the following open source repos:
 requests (Apache-2.0 License: https://github.com/psf/requests/blob/master/LICENSE)  
 pyOpenSSL (Apache-2.0 License https://github.com/pyca/pyopenssl/blob/main/LICENSE)  
 cryptography (Apache-2.0 https://github.com/pyca/cryptography/blob/main/LICENSE.APACHE)  
-idna (BSD 3-Clause License https://github.com/kjd/idna/blob/master/LICENSE.md) 
+idna (BSD 3-Clause License https://github.com/kjd/idna/blob/master/LICENSE.md)

requirements/core.txt

@@ -1,6 +1,5 @@
 jsonschema==3.2.0
 pyrsistent==0.16.0
-mmh3==2.5.1
 requests>=2.21
 pyOpenSSL>=19.1.0
 cryptography>=2.8.0