patches: drop zope.contenttype patch

This patch seems not needed
6 jobs for fix/drop_patches in 0 seconds (queued for 1 second)
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner1

00:49:18

failed ERP5.PerformanceTest-TestRunner1

00:26:43

failed ERP5.UnitTest-TestRunner1

01:38:43

failed ERP5.UnitTest-Zope2-ForTestRunner1

03:44:07

failed ERP5.UnitTest-TestRunner1

02:08:11

failed ERP5.UnitTest-Zope2-ForTestRunner1

02:23:50