remove appearanceSwitcher

because the dark theme uses custom chroma for syntax highlighting
 (which looks stupid on light theme)

config/_default/params.toml

@@ -12,6 +12,7 @@
 # colorScheme = "avocado"
 # colorScheme = "cherry"
 colorScheme = "ocean"
+# colorScheme = "slate"
 # defaultAppearance = "light"
 # autoSwitchAppearance = false
 # colorScheme = "sapphire"
@@ -34,7 +35,7 @@ rssFullContent = true
 [footer]
   showCopyright = true
   showThemeAttribution = true
-  showAppearanceSwitcher = true
+  # showAppearanceSwitcher = true
   showScrollToTop = true
 
 [homepage]