remove PatchedAWS flag

Now that deps are sorted out in hackage, cabal is unlikely to try to
install a too old AWS, so I don't think this flag is worth the bother of
being completely correct with the dependency versioning.

This avoids me needing to enable to flag on the autobuilders..

debian/rules

@@ -8,10 +8,6 @@ export RELEASE_BUILD=1
 %:
 	dh $@
 
-# Debian currently has a patched aws 0.9.2, rather than the newer 0.10.2.
-override_dh_auto_configure:
-	debian/cabal-wrapper configure -fPatchedAWS
-
 # Not intended for use by anyone except the author.
 announcedir:
 	@echo ${HOME}/src/git-annex/doc/news

git-annex.cabal

@@ -34,10 +34,6 @@ Description:
 Flag S3
   Description: Enable S3 support
 
-Flag PatchedAWS
-  Description: Building on system, like Debian, with old AWS patched to support git-annex
-  Default: False
-
 Flag WebDAV
   Description: Enable WebDAV support
 
@@ -155,11 +151,7 @@ Executable git-annex
     CPP-Options: -DWITH_CRYPTOHASH
 
   if flag(S3)
-    Build-Depends: conduit, resourcet, conduit-extra
-    if flag(PatchedAWS)
-      Build-Depends: aws (>= 0.9.2)
-    else
-      Build-Depends: aws (>= 0.10.4)
+    Build-Depends: conduit, resourcet, conduit-extra, aws (>= 0.9.2)
     CPP-Options: -DWITH_S3
 
   if flag(WebDAV)