Remove mini_parser target

It's already included in srcs for treble_sepolicy_tests.

Bug: 65263013
Test: build
Change-Id: I208ec6a864127a059fb389417a9c6b259d7474cb
(cherry picked from commit b67c757c)

tests/Android.bp

@@ -27,12 +27,6 @@ python_defaults {
     },
 }
 
-python_binary_host {
-    name: "mini_parser",
-    srcs: ["mini_parser.py"],
-    defaults: ["py2_only"],
-}
-
 python_binary_host {
     name: "treble_sepolicy_tests",
     srcs: [