Revert "ENSWEB-4692: function to build json file for widgets.ensembl"
Revert "ENSWEB-4692: function to build json file for widgets.ensembl"

This reverts commit 5d21f6969464f534b0993eca271c3a0668d06a86.

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode