A crucial certification needed to build two tunnels that officials believe would help solve California’s water delivery problems was withdrawn Friday, ensuring that Gov. Jerry Brown’s pet water project won’t be approved before he leaves office in January. The California Department of Water Resources withdrew its petition seeking approval of Brown’s $17 billion twin tunnels plan, known as California WaterFix, which would take water out of the Sacramento-San Joaquin River Delta and deliver it to users in the south.