Revert "[themes-megapack] Add `ewal-spacemacs-themes` to `themes-megapack` layer."

This reverts commit 883cf97308.

CHANGELOG.develop

@@ -2600,7 +2600,6 @@ Other:
 - Remove themes that were deleted from Melpa (thanks to Henrique Jung)
 - Added =eziam-theme= and =kaolin-themes= (thanks to Sylvain Benner)
 - Added =doom-themes= (thanks to Codruț Constantin Gușoi)
-- Created and added =ewal-spacemacs-themes= (thanks to Uroš Perišić)
 - Added =chocolate-theme= (thanks to Henrique Jung)
 - Updated =doom-themes= list to reflect upstream (thanks to Dominic Pearson)
 **** Tmux

core/core-themes-support.el

@@ -201,10 +201,6 @@
     (doom-tomorrow-night              . doom-themes)
     (doom-vibrant                     . doom-themes)
     (doom-wilmersdorf                 . doom-themes)
-    (ewal-spacemacs-modern                . ewal-spacemacs-themes)
-    (ewal-spacemacs-modern-high-contrast  . ewal-spacemacs-themes)
-    (ewal-spacemacs-classic               . ewal-spacemacs-themes)
-    (ewal-spacemacs-classic-high-contrast . ewal-spacemacs-themes)
     (solarized-light                  . solarized-theme)
     (solarized-dark                   . solarized-theme)
     (spacemacs-light                  . spacemacs-theme)

layers/+themes/themes-megapack/README.org

@@ -13,7 +13,6 @@ This layer installs around 100 themes for Emacs.
 ** Features:
 - Have access to all included themes in this [[http://themegallery.robdor.com][theme gallery]] from [[http://www.twitter.com/robmerrell][Rob Merrell]].
 - Easily try a theme by invoking helm-themes with: ~SPC T s~.
-- Theme Spacemacs using [[https://github.com/dylanaraps/pywal][pywal]] by choosing one of the =ewal-spacemacs-*= themes.
 
 * Install
 To use this configuration layer, add it to your =~/.spacemacs=. You will need to

layers/+themes/themes-megapack/packages.el

@@ -37,7 +37,6 @@
     django-theme
     doom-themes
     dracula-theme
-    ewal-spacemacs-themes
     espresso-theme
     exotica-theme
     eziam-theme