fix(repo): remove tools/dotbot-asdf submodule

Author: ivuorinen

add-submodules.sh

@@ -11,8 +11,6 @@ git submodule add --name dotbot-include \
   -f https://gitlab.com/gnfzdz/dotbot-include.git tools/dotbot-include
 git submodule add --name dotbot-pip \
   -f https://github.com/sobolevn/dotbot-pip.git tools/dotbot-pip
-git submodule add --name dotbot-asdf \
-  -f https://github.com/sobolevn/dotbot-asdf tools/dotbot-asdf
 
 # other repos
 git submodule add --name cheat-community \