fish shell error

mona@ > rm ~/.config/fish/config.fish
fish: Unknown command '__fish_pwd'
fish: echo $_ " "; __fish_pwd
                   ^
in command substitution
	called on standard input

fish: Unknown command 'rm'
fish: Unknown command 'sed'
/usr/local/Cellar/fish/2.2.0/share/fish/functions/prompt_pwd.fish (line 2): 	echo $PWD | sed -e "s|^$realhome|~|" $args_pre -e 's-\([^/.]\)[^/]*/-\1/-g' $args_post
                                                                            	            ^
in function 'prompt_pwd'
	called on line 6 of file /usr/local/Cellar/fish/2.2.0/share/fish/functions/fish_prompt.fish

in command substitution
	called on line 4 of file /usr/local/Cellar/fish/2.2.0/share/fish/functions/fish_prompt.fish

in function 'fish_prompt'
	called on standard input

in command substitution
	called on standard input

fish: Unknown command '__fish_pwd'
fish: echo $_ " "; __fish_pwd
                   ^
in command substitution
	called on standard input