Remove review xblock from edx-platform

requirements/edx/base.in

@@ -150,6 +150,5 @@ unicodecsv                          # Easier support for CSV files with unicode
 user-util                           # Functionality for retiring users (GDPR compliance)
 web-fragments                       # Provides the ability to render fragments of web pages
 XBlock                              # Courseware component architecture
-xblock-review                       # XBlock which displays problems from earlier in the course for ungraded retries
 xblock-utils                        # Provides utilities used by the Discussion XBlock
 zendesk                             # Python API for the Zendesk customer support system

requirements/edx/base.txt

@@ -243,7 +243,6 @@ web-fragments==0.2.2
 webencodings==0.5.1       # via html5lib
 webob==1.8.5              # via xblock
 wrapt==1.10.5
-xblock-review==1.1.5
 xblock-utils==1.2.0
 xblock==1.2.2
 zendesk==1.1.1

requirements/edx/development.txt

@@ -349,7 +349,6 @@ webencodings==0.5.1
 webob==1.8.5
 werkzeug==0.14.1
 wrapt==1.10.5
-xblock-review==1.1.5
 xblock-utils==1.2.0
 xblock==1.2.2
 xmltodict==0.11.0

requirements/edx/testing.txt

@@ -332,7 +332,6 @@ webencodings==0.5.1
 webob==1.8.5
 werkzeug==0.14.1          # via flask
 wrapt==1.10.5
-xblock-review==1.1.5
 xblock-utils==1.2.0
 xblock==1.2.2
 xmltodict==0.11.0         # via moto