Update bash history to be unlimited

bash/environment

@@ -17,9 +17,9 @@ HISTCONTROL=ignoredups:ignorespace
 # append to the history file, don't overwrite it
 shopt -s histappend
 
-# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
-HISTSIZE=100000
-HISTFILESIZE=200000
+# Use empty string for unlimited history
+HISTSIZE=
+HISTFILESIZE=
 
 # check the window size after each command and, if necessary,
 # update the values of LINES and COLUMNS.