req-swh*: Remove old package loader implementations references

Related to T1389 T2098
Related to D2306 D2305 D2304

requirements-swh-dev.txt

@@ -6,12 +6,9 @@
 -e ../swh-journal
 -e ../swh-lister
 -e ../swh-loader-core
--e ../swh-loader-dir
 -e ../swh-loader-git
 -e ../swh-loader-mercurial
--e ../swh-loader-pypi
 -e ../swh-loader-svn
--e ../swh-loader-tar
 -e ../swh-mirror-forge
 -e ../swh-model
 -e ../swh-objstorage[testing]

requirements-swh.txt

@@ -6,13 +6,9 @@ swh.indexer
 swh.journal
 swh.lister
 swh.loader.core
-swh.loader.debian
-swh.loader.dir
 swh.loader.git
 swh.loader.mercurial
-swh.loader.pypi
 swh.loader.svn
-swh.loader.tar
 swh.mirror.forge
 swh.model
 swh.objstorage[testing]