gc unused variable b(ranch)

lib/libvcc/generate.py

@@ -827,13 +827,7 @@ if os.path.isdir(os.path.join(srcroot, ".git")):
 		" show -s --pretty=format:%H"
 	], shell=True, universal_newlines=True)
 	v = v.strip()
-	b = subprocess.check_output([
-		"git --git-dir=" + os.path.join(srcroot, ".git") +
-		" rev-parse --abbrev-ref HEAD"
-	], shell=True, universal_newlines=True)
-	b = b.strip()
 else:
-	b = "NOGIT"
 	v = "NOGIT"
 
 vcsfn = os.path.join(srcroot, "include", "vcs_version.h")