Update fish shell config

config/fish/functions/fish_mode_prompt.fish

@@ -1,15 +1,11 @@
-function fish_mode_prompt
-    if test "$fish_key_bindings" = "fish_vi_key_bindings"
-        or test "$fish_key_bindings" = "fish_hybrid_key_bindings"
-        switch $fish_bind_mode
-            case default
-                prompt_segment blue black "N"
-            case insert
-                prompt_segment green black "I"
-            case replace_one
-                prompt_segment red black "R"
-            case visual
-                prompt_segment magenta black "V"
-        end
-    end
-end
+# This is handled inside fish_mode_prompt (see `__bobthefish_prompt_vi`)
+#
+# If you want to override this with your own mode prompt, disable bobthefish's
+# built-in mode prompt in your fish config:
+#
+#     set -g theme_display_vi no
+#
+set -g theme_nerd_fonts yes
+set -g GPG_TTY (tty)
+
+function fish_mode_prompt; end