For some ppl its not an issue but others may like to have their contacts numbers and email ids in separate apps.
So latest androids versions 4.x and 5.x don’t have that “contacts with numbers only” option in stock phone app as earlier, so here is a way I helped myself with the problem on my Moto G1.
1.take backup of your phone book with whatever app you are comfortable with and save that file for safe side in your mail.
2.Disable the google contacts sync by going to Android settings app, settings>accounts>google>Accounts Sync gmail id
3.download these two tiny apps from playstore, A)
Contacts2vcf B)
Delete All Contacts.


The
cotacts2vcf app, can read only the contacts with phone numbers, Use that app to write those contacts to a vcf file and save it.
Now your "contacts with phone numbers only" are saved in a vcf file in your phone memory (have a note of the location where it was saved).
Use the
Delete all contacts app to delete the contacts which are there in the phone memory.
So by now you left with no contacts in your phone, next thing is to download the backed up contacts by
contacts2vcf.
4.Now open the vcf file earlier saved, by this all numbers only contacts will be in your stock
phone app.
I hope it helps you.