base-files: remove unwanted ']' in bash prompt

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

appends/oe-core/base-files/profile

@@ -6,7 +6,7 @@ PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin"
 TERM="xterm-256color"
 
 # Set the prompt for bash
-PS1='\u@\h:\W]\$ '
+PS1='\u@\h:\W\$ '
 
 # loop profile.d scriptlets
 if [ -d /etc/profile.d ]; then