Remove unnecessary values from the params hash
Remove unnecessary values from the params hash

So that searches with blank params will end up with matching urls

Motejl/open-data-certificate,Motejl/open-data-certificate,theodi/open-data-certificate,zoul/open-data-certificate,ahmadassaf/open-data-certificate,theodi/open-data-certificate,zoul/open-data-certificate,zoul/open-data-certificate,Motejl/open-data-certificate,theodi/open-data-certificate,istvan-antal/open-data-certificate,theodi/open-data-certificate,istvan-antal/open-data-certificate,ahmadassaf/open-data-certificate,Motejl/open-data-certificate,ahmadassaf/open-data-certificate,istvan-antal/open-data-certificate,ahmadassaf/open-data-certificate,zoul/open-data-certificate