/usr/share/zsh/functions/Prompts/ is in zsh-common 5.0.2-3ubuntu6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/zsh/functions/Prompts/prompt_adam1_setup
/usr/share/zsh/functions/Prompts/prompt_adam2_setup
/usr/share/zsh/functions/Prompts/prompt_bart_setup
/usr/share/zsh/functions/Prompts/prompt_bigfade_setup
/usr/share/zsh/functions/Prompts/prompt_clint_setup
/usr/share/zsh/functions/Prompts/prompt_elite2_setup
/usr/share/zsh/functions/Prompts/prompt_elite_setup
/usr/share/zsh/functions/Prompts/prompt_fade_setup
/usr/share/zsh/functions/Prompts/prompt_fire_setup
/usr/share/zsh/functions/Prompts/prompt_off_setup
/usr/share/zsh/functions/Prompts/prompt_oliver_setup
/usr/share/zsh/functions/Prompts/prompt_pws_setup
/usr/share/zsh/functions/Prompts/prompt_redhat_setup
/usr/share/zsh/functions/Prompts/prompt_special_chars
/usr/share/zsh/functions/Prompts/prompt_suse_setup
/usr/share/zsh/functions/Prompts/prompt_walters_setup
/usr/share/zsh/functions/Prompts/prompt_zefram_setup
/usr/share/zsh/functions/Prompts/promptinit