Remove reference to _unpacked_archives

Author: fingolfin

README.md

@@ -154,7 +154,6 @@ and exchange data:
 - `_archives` is used to store copies of all package archives
 - `_pkginfos` stores copies of the `PackageInfo.g` 
 - `_releases`: TODO
-- `_unpacked_archives`: TODO
 
 
 ## What do we test, and how?

tools/validate_package.py

@@ -19,19 +19,12 @@
 Should be run after scan_for_updates.py. Arguments can be either a package
 name, or the path to a meta.json file. For example:
 
-    $ tools/validate_package.py aclib digraphs walrus/meta.json
-    aclib: _archives/aclib-1.3.2.tar.gz already exists, not downloading again
-    aclib: unpacking _archives/aclib-1.3.2.tar.gz into _unpacked_archives ...
-    aclib: current release version is 1.3.2, but previous release version was 1.3.2
-    aclib: validation FAILED!
-    $ tools/validate_package.py digraphs
-    digraphs: _archives/digraphs-1.5.0.tar.gz already exists, not downloading again
-    digraphs: unpacking _archives/digraphs-1.5.0.tar.gz into _unpacked_archives ...
-    digraphs: validated ok!
+    $ tools/validate_package.py aclib
+    _archives/aclib-1.3.3.tar.gz already exists, not downloading again
+    aclib: PASSED
     $ tools/validate_package.py walrus/meta.json
-    walrus: _archives/walrus-0.9991.tar.gz already exists, not downloading again
-    walrus: unpacking _archives/walrus-0.9991.tar.gz into _unpacked_archives ...
-    walrus: the file walrus/meta.yml.old is missing, FAILED!
+    _archives/walrus-0.9991.tar.gz already exists, not downloading again
+    walrus: PASSED
 """
 
 import os