[Registry Mobile] Remove sections from mobile version

[law909]

• Data explorer section with Venn diagrams
• Distribution by SDG tiles
• "About the Digital Public Good Standard" Button

[law909]

The "About the Digital Public Good Standard" button is wordpress content, can be hidden from wp admin or through the wp theme. Moved to #239

[gazdagergo]

Acceptance Criteria / User Acceptance Test

• visit the https://digitalpublicgoods.net/registry/ url on a mobile device or emulated mobile width in browser
• the data section with number and Venn diagramm should NOT be visible
• the tiles diagram should NOT be visible