Remove unnecessary "Page generated" line

Dependencies

• [2] JARRBLZD Bootstrapify the Hydra forms (except the project and jobset edit pages)
• [3] QL55ECJ6 - adapted ui for hydra, more in line with nixos.org website
• [4] OEPUOUNB Using twitter bootstrap for more consistent looks for Hydra
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• edit in src/root/layout.tt at line 116
  [2.9221]→[2.9221:9279](∅→∅)
  − Page generated on [% INCLUDE renderDateTime %].