removed unused update_content.php
removed unused update_content.php

qqming113/datawrapper,rubensfernando/datawrapper,kendrick-k/datawrapper,elaOnMars/datawrapper,kendrick-k/datawrapper,ThuyNTran/datawrapper,shelsonjava/datawrapper,datafunk/datawrapper,elaOnMars/datawrapper,robmcloughlin/Insights,robmcloughlin/Insights,motherjones/datawrapper,plusgut/datawrapper,ThuyNTran/datawrapper,elaOnMars/datawrapper,motherjones/datawrapper,motherjones/datawrapper,plusgut/datawrapper,datafunk/datawrapper,washingtonpost/datawrapper,devinit/datawrapper,datafunk/datawrapper,elaOnMars/datawrapper,grepman/datawrapper,grepman/datawrapper,rubensfernando/datawrapper,kendrick-k/datawrapper,robmcloughlin/Insights,shelsonjava/datawrapper,grepman/datawrapper,shelsonjava/datawrapper,ThuyNTran/datawrapper,kendrick-k/datawrapper,ThuyNTran/datawrapper,robmcloughlin/Insights,washingtonpost/datawrapper,devinit/datawrapper,qqming113/datawrapper,qqming113/datawrapper,robmcloughlin/Insights,rubensfernando/datawrapper,devinit/datawrapper,elaOnMars/datawrapper,motherjones/datawrapper,grepman/datawrapper,kendrick-k/datawrapper,grepman/datawrapper,ThuyNTran/datawrapper,shelsonjava/datawrapper,grepman/datawrapper,plusgut/datawrapper,elaOnMars/datawrapper,qqming113/datawrapper,motherjones/datawrapper,devinit/datawrapper,devinit/datawrapper,rubensfernando/datawrapper,motherjones/datawrapper,washingtonpost/datawrapper,qqming113/datawrapper,washingtonpost/datawrapper,kendrick-k/datawrapper,datafunk/datawrapper,ThuyNTran/datawrapper,washingtonpost/datawrapper,datafunk/datawrapper,devinit/datawrapper,washingtonpost/datawrapper,rubensfernando/datawrapper,datafunk/datawrapper,shelsonjava/datawrapper,plusgut/datawrapper,shelsonjava/datawrapper,qqming113/datawrapper