diff --git a/classes/externalgitsrc.bbclass b/classes/externalgitsrc.bbclass
deleted file mode 100644
index 4b6ede9..0000000
--- a/classes/externalgitsrc.bbclass
+++ /dev/null
@@ -1,16 +0,0 @@
-# Provides git describe tag from yocto root directory
-
-EXTERNALSRC = "${@os.path.abspath(os.path.join("${TOPDIR}", os.pardir))}"
-
-def get_externalsrc_rev(d):
-    import subprocess
-    srcdir = d.expand(d.getVar("EXTERNALSRC"))
-    #bb.note("external source: %s" % (srcdir))
-    rev = subprocess.check_output("cd %s && git describe --tags --dirty " % (srcdir),
-                                  shell=True).strip()
-    
-    rev = rev.decode("utf-8") 
-    d.setVar('BB_DONT_CACHE', '1')
-    return rev
-
-EXTERNALSRC_GIT_SRCREV := "${@get_externalsrc_rev(d)}"