remove VERSION file

it overrides what version.sh prints and thus makes its output
from release branches rather useless

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 2f71aeb30161edb5cb0fea5d3080094a22cc3038)

Conflicts:

	VERSION
(cherry picked from commit f543d32455a30c7e11206241184dfb16b8a8081c)

Conflicts:

	VERSION
version.sh: Print versions based on the last git tag for release branches

release branches are detected by checking if "git" is not in RELEASE
This changes "N-64706-g2f71aeb" to "n2.3-8-g2f71aeb"
for git master theres no change

This should improve the readability of lists of versions which come from
more than 1 release branch or master + release. fate.ffmpeg.org is
one possible example

Reviewed-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ee606fd0317df202b59946cf9b738c0a01056316)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 1f4d779e87050111f831f24645580f04e0b1917b)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>