remove colorhash (this will be done client side)

Pipfile

@@ -55,7 +55,6 @@ uvloop = "~=0.14.0"
 # TODO: keep an eye on piwheel builds and update this once available (https://www.piwheels.org/project/cryptography/)
 cryptography = "~=3.3.2"
 "pdfminer.six" = "*"
-colorhash = "*"
 
 [dev-packages]
 coveralls = "*"

src/documents/models.py

@@ -8,7 +8,6 @@ from collections import OrderedDict
 import pathvalidate
 
 import dateutil.parser
-from colorhash import ColorHash
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.db import models
@@ -93,15 +92,6 @@ class Tag(MatchingModel):
         verbose_name = _("tag")
         verbose_name_plural = _("tags")
 
-    def save(self, *args, **kwargs):
-        if self.colour == "":
-            self.colour = ColorHash(
-                self.name,
-                lightness=(0.35, 0.45, 0.55, 0.65),
-                saturation=(0.2, 0.3, 0.4, 0.5)).hex
-
-        super().save(*args, **kwargs)
-
 
 class DocumentType(MatchingModel):