Remove username and hosrname from fallback bash prompt

Intentionally extracted from #181

home/.bashrc

@@ -87,17 +87,17 @@ if [ -n "$force_color_prompt" ]; then
 fi
 
 if [ "$color_prompt" = yes ] && [ -z "$in_nested_nix_bash" ]; then
-  PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
+  PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\[\033[01;34m\]\w\[\033[00m\]\$ '
 else
-  PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
+  PS1='${debian_chroot:+($debian_chroot)}\w\$ '
 fi
 unset color_prompt force_color_prompt
 
 if [ -z "$in_nested_nix_bash" ]; then
   # If this is an xterm set the title to user@host:dir
   case "$TERM" in
   xterm* | rxvt*)
-    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
+    PS1="\[\e]0;${debian_chroot:+($debian_chroot)} \w\a\]$PS1"
     ;;
   *) ;;