build(pkgbuild): update license and remove git dependency

The package license has been updated from GPL3 to MIT.
The explicit 'git' dependency was removed from the PKGBUILD and SRCINFO.

PKGBUILD

@@ -6,8 +6,7 @@ pkgrel=1
 pkgdesc='A powerful AI coding agent. Built for the terminal.'
 arch=('x86_64' 'aarch64')
 url='https://github.com/tfkhdyt/geminicommit'
-license=('GPL3')
-depends=('git')
+license=('MIT')
 makedepends=('go')
 source=("https://github.com/opencode-ai/${pkgname}/archive/refs/tags/v${pkgver}.tar.gz")
 sha256sums=('53e23c62284a50c38fd664de441b6db540fa5c944358fffd319f548ee504cb84')