package/python-rsa: use poetry setup type

Use the new poetry setup type which automatically pulls in the
host-python-poetry-core dependency.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/python-rsa/python-rsa.mk

@@ -7,10 +7,9 @@
 PYTHON_RSA_VERSION = 4.9
 PYTHON_RSA_SOURCE = rsa-$(PYTHON_RSA_VERSION).tar.gz
 PYTHON_RSA_SITE = https://files.pythonhosted.org/packages/aa/65/7d973b89c4d2351d7fb232c2e452547ddfa243e93131e7cfa766da627b52
-PYTHON_RSA_SETUP_TYPE = pep517
+PYTHON_RSA_SETUP_TYPE = poetry
 PYTHON_RSA_LICENSE = Apache-2.0
 PYTHON_RSA_LICENSE_FILES = LICENSE
 PYTHON_RSA_CPE_ID_VALID = YES
-PYTHON_RSA_DEPENDENCIES = host-python-poetry-core
 
 $(eval $(python-package))