Remove the "Using script's directory as PYENV_DIR if shim is invoked with a script argument" feature

It's impossible to 100% reliably extract the script argument from the command line for all and unknown Python versions and implementations

libexec/pyenv-rehash

@@ -67,19 +67,6 @@ set -e
 [ -n "\$PYENV_DEBUG" ] && set -x
 
 program="\${0##*/}"
-if [[ "\$program" = "python"* ]]; then
-  for arg; do
-    case "\$arg" in
-    -c* | -- ) break ;;
-    */* )
-      if [ -f "\$arg" ]; then
-        export PYENV_DIR="\${arg%/*}"
-        break
-      fi
-      ;;
-    esac
-  done
-fi
 
 export PYENV_ROOT="$PYENV_ROOT"
 exec "$(command -v pyenv)" exec "\$program" "\$@"