Remove color utility and tinycolor module

app/javascript/legacy/util.coffee

@@ -1,23 +0,0 @@
-import tinycolor from 'tinycolor2'
-
-window.doppler = (percentage, value, relative = false) ->
-  while percentage >= 1
-    percentage /= 10
-  tc_color = tinycolor(value).toRgb()
-  color = [tc_color.r, tc_color.g, tc_color.b]
-  if relative
-    for _c, i in color
-      x = (255 - color[i]) * percentage
-      if x == 0
-        x = color[i] * percentage
-        color[i] -= x
-      else
-        color[i] += x
-  else
-    adj = 255 * percentage
-    for _c, i in color
-      if color[i] + adj > 255
-        color[i] -= adj
-      else
-        color[i] += adj
-  '#' + color.map((x) -> Math.floor(Math.max(0, Math.min(255, x))).toString(16)).join ''

app/javascript/packs/legacy.coffee

@@ -6,7 +6,6 @@ import 'popper.js'
 import 'bootstrap'
 
 import '../legacy/pagination'
-import '../legacy/util'
 
 _ready = ->
   $('[data-toggle="tooltip"]').tooltip()