build: remove unused libsass dependency (openedx#1987)

(Bumps version: 5.1.1 -> 5.2.0)

We remove the libsass Python requirement as it doesn't seem to be used
any more. (I was able to compile ORA's assets by running `make static`;
no Python dependencies needed.) Removing libsass from ORA's requirements
will allow us to move it out of edx-platform's base requirements and into a new
static-asset-compilation-specific requirements stage.

Libsass [1] is a deprecated Sass compilation library written in C,
and installing it into edx-platform adds a whole minute to the
build because there are no pre-compiled binaries available
for the version we install.

1. https://sass-lang.com/libsass/

Closes: openedx#1986

Makefile

@@ -26,7 +26,7 @@ clean: ## remove generated byte code, coverage reports, and build artifacts
 ##################
 
 install-python: ## Install python dependencies
-	pip install -r requirements/base.txt --only-binary=lxml,libsass
+	pip install -r requirements/base.txt --only-binary=lxml
 
 install-js: ## install JavaScript dependencies
 	npm install

openassessment/__init__.py

@@ -1,4 +1,4 @@
 """
 Initialization Information for Open Assessment Module
 """
-__version__ = '5.1.1'
+__version__ = '5.2.0'

package.json

@@ -1,6 +1,6 @@
 {
   "name": "edx-ora2",
-  "version": "5.1.1",
+  "version": "5.2.0",
   "repository": "https://github.com/openedx/edx-ora2.git",
   "dependencies": {
     "@edx/frontend-build": "^6.1.1",

requirements/base.in

@@ -22,7 +22,6 @@ defusedxml
 django-model-utils
 jsonfield
 lazy
-libsass
 loremipsum
 lxml
 path.py

requirements/base.txt

@@ -94,8 +94,6 @@ jsonfield==3.1.0
     #   edx-submissions
 lazy==1.5
     # via -r requirements/base.in
-libsass==0.22.0
-    # via -r requirements/base.in
 loremipsum==1.0.5
     # via
     #   -c requirements/constraints.txt

requirements/quality.txt

@@ -262,8 +262,6 @@ lazy==1.5
     # via -r requirements/test.txt
 lazy-object-proxy==1.9.0
     # via astroid
-libsass==0.22.0
-    # via -r requirements/test.txt
 loremipsum==1.0.5
     # via
     #   -c requirements/constraints.txt

requirements/test-acceptance.txt

@@ -251,8 +251,6 @@ lazy==1.5
     # via
     #   -r requirements/test.txt
     #   bok-choy
-libsass==0.22.0
-    # via -r requirements/test.txt
 loremipsum==1.0.5
     # via
     #   -c requirements/constraints.txt

requirements/test.txt

@@ -198,8 +198,6 @@ junit-xml==1.9
     # via cfn-lint
 lazy==1.5
     # via -r requirements/base.txt
-libsass==0.22.0
-    # via -r requirements/base.txt
 loremipsum==1.0.5
     # via
     #   -c requirements/constraints.txt