gnucash maint: Remove reference to the deleted gnc-value-portfolio script from README.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/655803a1 (commit)
	from  https://github.com/Gnucash/gnucash/commit/c3f528b8 (commit)



commit 655803a1ca839bcc2c0065eecc31cd1a0995beb1
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Apr 9 15:23:40 2018 -0700

    Remove reference to the deleted gnc-value-portfolio script from README.



Summary of changes:
 src/quotes/README | 6 ------
 1 file changed, 6 deletions(-)