Streamfield: remove plus icon from button, adjust X icon color

app/soapbox/components/ui/streamfield/streamfield.tsx

@@ -76,7 +76,7 @@ const Streamfield: React.FC<IStreamfield> = ({
               {values.length > minItems && onRemoveItem && (
                 <IconButton
                   iconClassName='h-4 w-4'
-                  className='bg-transparent text-gray-400 hover:text-gray-600'
+                  className='bg-transparent text-gray-600 hover:text-gray-600'
                   src={require('@tabler/icons/x.svg')}
                   onClick={() => onRemoveItem(i)}
                   title={intl.formatMessage(messages.remove)}
@@ -89,7 +89,6 @@ const Streamfield: React.FC<IStreamfield> = ({
 
       {onAddItem && (
         <Button
-          icon={require('@tabler/icons/plus.svg')}
           onClick={onAddItem}
           disabled={values.length >= maxItems}
           theme='secondary'