[PATCH] externalsrc: Remove task dependencies to deleted tasks

["Tomasz Dziendzielski" <tomasz.dziendzielski@gmail.com>]

The python3 recipe sets `do_create_manifest[depends] += "${PN}:do_patch"`
but do_patch is removed in externalsrc and fails with:
| ERROR: Task do_create_manifest in <PATH>/python3_3.8.2.bb depends upon
| non-existent task do_patch in <PATH>/python3_3.8.2.bb

It is safe to simply remove these dependencies since they should be
already covered.

[YOCTO #14151]

Signed-off-by: Tomasz Dziendzielski <tomasz.dziendzielski@gmail.com>
---
 meta/classes/externalsrc.bbclass | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/classes/externalsrc.bbclass b/meta/classes/externalsrc.bbclass
index 7a7d31e311..8e164707e6 100644
--- a/meta/classes/externalsrc.bbclass
+++ b/meta/classes/externalsrc.bbclass
@@ -107,6 +107,9 @@ python () {
         for task in d.getVar("SRCTREECOVEREDTASKS").split():
             if local_srcuri and task in fetch_tasks:
                 continue
+            for bbtask in (d.getVar('__BBTASKS', False) or []):
+                if 'depends' in (d.getVarFlags(bbtask, False) or []) and ('${PN}:%s' % task) in d.getVarFlags(bbtask, False)['depends']:
+                    d.setVarFlag(bbtask, 'depends', d.getVarFlags(bbtask, False)['depends'].replace(('${PN}:%s' % task), ''))
             bb.build.deltask(task, d)
 
         d.prependVarFlag('do_compile', 'prefuncs', "externalsrc_compile_prefunc ")
-- 
2.30.0