Update _config.yml

Author: vagsart

_config.yml

@@ -27,7 +27,6 @@ back_to_top: true # set to false to disable the back to top button
 # -----------------------------------------------------------------------------
 # Theme
 # -----------------------------------------------------------------------------
-theme_mode: light
 # repo color theme
 repo_theme_light: default # https://github.com/anuraghazra/github-readme-stats/blob/master/themes/README.md
 repo_theme_dark: dark # https://github.com/anuraghazra/github-readme-stats/blob/master/themes/README.md