gn2bp: delete compat.py

gn2bp does not need to support python2.

Test: none
Change-Id: I00223ec3e53bf629342380eadf5f867c333863f6
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 4cacf7c..0b2893f 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -34,8 +34,6 @@
 
 import gn_utils
 
-from compat import itervalues
-
 ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
 # Arguments for the GN output directory.
@@ -617,7 +615,7 @@
     self.modules[module.name] = module
 
   def to_string(self, output):
-    for m in sorted(itervalues(self.modules), key=lambda m: m.name):
+    for m in sorted(self.modules.values(), key=lambda m: m.name):
       m.to_string(output)