Remove _assert_compute_node_has_enough_memory from filter_scheduler.py
Remove _assert_compute_node_has_enough_memory from filter_scheduler.py

Now the function _assert_compute_node_has_enough_memory has no use
in filter_scheduler.py, just remove it to make code more clean.

Change-Id: Ie6f104368140b69a60e124ea96ef6bf7715fe34e

orbitfp7/nova,citrix-openstack-build/nova,alaski/nova,cloudbase/nova-virtualbox,double12gzh/nova,leilihh/nova,CiscoSystems/nova,CEG-FYP-OpenStack/scheduler,devendermishrajio/nova_test_latest,tudorvio/nova,orbitfp7/nova,angdraug/nova,mandeepdhami/nova,CEG-FYP-OpenStack/scheduler,NeCTAR-RC/nova,cernops/nova,alvarolopez/nova,mikalstill/nova,zaina/nova,mmnelemane/nova,varunarya10/nova_test_latest,TwinkleChawla/nova,jeffrey4l/nova,Yusuke1987/openstack_template,badock/nova,viggates/nova,Stavitsky/nova,klmitch/nova,mikalstill/nova,openstack/nova,tealover/nova,apporc/nova,virtualopensystems/nova,citrix-openstack-build/nova,viggates/nova,jianghuaw/nova,jianghuaw/nova,belmiromoreira/nova,sacharya/nova,edulramirez/nova,rrader/nova-docker-plugin,adelina-t/nova,cyx1231st/nova,JioCloud/nova_test_latest,LoHChina/nova,klmitch/nova,petrutlucian94/nova_dev,CloudServer/nova,Juniper/nova,bgxavier/nova,cyx1231st/nova,silenceli/nova,devoid/nova,projectcalico/calico-nova,berrange/nova,Metaswitch/calico-nova,akash1808/nova_test_latest,JioCloud/nova_test_latest,gooddata/openstack-nova,cloudbau/nova,dawnpower/nova,gooddata/openstack-nova,affo/nova,rajalokan/nova,jeffrey4l/nova,raildo/nova,whitepages/nova,bgxavier/nova,BeyondTheClouds/nova,tanglei528/nova,tianweizhang/nova,akash1808/nova,kimjaejoong/nova,ntt-sic/nova,rajalokan/nova,TieWei/nova,gooddata/openstack-nova,CCI-MOC/nova,tudorvio/nova,projectcalico/calico-nova,OpenAcademy-OpenStack/nova-scheduler,redhat-openstack/nova,JianyuWang/nova,Yusuke1987/openstack_template,belmiromoreira/nova,MountainWei/nova,devendermishrajio/nova,silenceli/nova,adelina-t/nova,joker946/nova,rrader/nova-docker-plugin,JioCloud/nova,phenoxim/nova,jianghuaw/nova,noironetworks/nova,alaski/nova,zaina/nova,JioCloud/nova,dims/nova,vmturbo/nova,yatinkumbhare/openstack-nova,leilihh/nova,iuliat/nova,sebrandon1/nova,Francis-Liu/animated-broccoli,mahak/nova,shail2810/nova,akash1808/nova_test_latest,cloudbase/nova,Juniper/nova,shahar-stratoscale/nova,tealover/nova,alexandrucoman/vbox-nova-driver,virtualopensystems/nova,Francis-Liu/animated-broccoli,Metaswitch/calico-nova,sebrandon1/nova,ewindisch/nova,yosshy/nova,fnordahl/nova,isyippee/nova,rickerc/nova_audit,barnsnake351/nova,scripnichenko/nova,mikalstill/nova,sacharya/nova,mandeepdhami/nova,blueboxgroup/nova,shahar-stratoscale/nova,petrutlucian94/nova,alvarolopez/nova,imsplitbit/nova,bclau/nova,cloudbase/nova-virtualbox,zhimin711/nova,edulramirez/nova,Tehsmash/nova,thomasem/nova,devendermishrajio/nova_test_latest,rajalokan/nova,vmturbo/nova,zzicewind/nova,phenoxim/nova,apporc/nova,j-carpentier/nova,ted-gould/nova,felixma/nova,badock/nova,vmturbo/nova,cloudbase/nova,noironetworks/nova,maelnor/nova,Juniper/nova,BeyondTheClouds/nova,takeshineshiro/nova,tangfeixiong/nova,hanlind/nova,openstack/nova,shail2810/nova,TwinkleChawla/nova,raildo/nova,eharney/nova,barnsnake351/nova,CiscoSystems/nova,petrutlucian94/nova,whitepages/nova,rahulunair/nova,imsplitbit/nova,j-carpentier/nova,yatinkumbhare/openstack-nova,redhat-openstack/nova,tangfeixiong/nova,leilihh/novaha,saleemjaveds/https-github.com-openstack-nova,Juniper/nova,eonpatapon/nova,nikesh-mahalka/nova,vladikr/nova_drafts,SUSE-Cloud/nova,NeCTAR-RC/nova,felixma/nova,jianghuaw/nova,thomasem/nova,akash1808/nova,TieWei/nova,devendermishrajio/nova,petrutlucian94/nova_dev,eonpatapon/nova,hanlind/nova,kimjaejoong/nova,BeyondTheClouds/nova,sebrandon1/nova,leilihh/novaha,affo/nova,bigswitch/nova,yosshy/nova,saleemjaveds/https-github.com-openstack-nova,rahulunair/nova,zzicewind/nova,Yuriy-Leonov/nova,watonyweng/nova,cernops/nova,isyippee/nova,blueboxgroup/nova,vmturbo/nova,ted-gould/nova,LoHChina/nova,JianyuWang/nova,ntt-sic/nova,CloudServer/nova,mmnelemane/nova,Yuriy-Leonov/nova,varunarya10/nova_test_latest,ewindisch/nova,eharney/nova,iuliat/nova,mgagne/nova,cloudbau/nova,luogangyi/bcec-nova,zhimin711/nova,Tehsmash/nova,luogangyi/bcec-nova,vladikr/nova_drafts,dims/nova,nikesh-mahalka/nova,alexandrucoman/vbox-nova-driver,angdraug/nova,cernops/nova,ruslanloman/nova,openstack/nova,rickerc/nova_audit,maelnor/nova,fnordahl/nova,double12gzh/nova,mgagne/nova,rajalokan/nova,tanglei528/nova,cloudbase/nova,joker946/nova,klmitch/nova,eayunstack/nova,Stavitsky/nova,CCI-MOC/nova,scripnichenko/nova,OpenAcademy-OpenStack/nova-scheduler,hanlind/nova,devoid/nova,mahak/nova,berrange/nova,bclau/nova,eayunstack/nova,rahulunair/nova,takeshineshiro/nova,spring-week-topos/nova-week,MountainWei/nova,spring-week-topos/nova-week,bigswitch/nova,SUSE-Cloud/nova,mahak/nova,tianweizhang/nova,dawnpower/nova,klmitch/nova,watonyweng/nova,ruslanloman/nova,gooddata/openstack-nova