Hello,
I have the following bug 
https://bugzilla.kernel.org/show_bug.cgi?id=178781 in btrfs check, is 
there a way to recover my filesystem in clean state without formatting 
or using btrsfck ? Of course, the point is no longer need the files 
which are damaged.
So is there a way to recover a btrfs filesystem by deleting the 
corrupted data instead of trying to restore it ?

btrfs fi df /mnt/Opera_Mobile_Emulator_12.1_Linux
Data, single: total=66.01GiB, used=0.00B
System, DUP: total=8.00MiB, used=16.00KiB
System, single: total=4.00MiB, used=0.00B
Metadata, DUP: total=5.00GiB, used=28.00KiB
Metadata, single: total=8.00MiB, used=0.00B
GlobalReserve, single: total=4.00MiB, used=0.00B

btrfs progs version 4.7.3 from Devuan

Label: 'backup'  uuid: 56040bbb-ed5c-47f2-82e2-34457bd7b4f3
         Total devices 1 FS bytes used 44.00KiB
         devid    1 size 298.91GiB used 76.04GiB path 
/dev/mapper/isw_bdffeeeijj_Volume0p7

uname -a
Linux localhost 4.5.0-0.bpo.1-amd64 #1 SMP Debian 4.5.1-1~bpo8+1 
(2016-04-20) x86_64 GNU/Linux

Result of btrfs-image on /dev/mapper/isw_bdffeeeijj_Volume0p7 : 
https://web.archive.org/web/20161020220914/https://filebin.net/7ni8kfpog1dxw4jc/btrfs-image_capture.xz

Thanks,