[patches] remove 004-package-openssl-broken.patch

Reason for this patch was the heartbleed bug in openssl versions (1.0.1 to
1.0.1f). In the meantime OpenWRT ships version 1.0.1i making this patch
obsolete.
Merge pull request #97 from freifunk-berlin/patches/remove_004_patch

[patches] remove 004-package-openssl-broken.patch