releasetools: Fix non-existent required dependency

HOST module img_from_target_files has non-existent required: zip2zip
HOST module releasetools_py3_test has non-existent required: otatools
HOST module releasetools_test has non-existent required: otatools

Bug: 7456955
Test: TH presubmit
Test: atest releasetools_test # Test result doesn't change
Change-Id: I4fa4fb9c120fda5d4cb309b1e3a2660c3387eb7f
diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index d6f2116..b52da87 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -73,9 +73,6 @@
         "releasetools_build_super_image",
         "releasetools_common",
     ],
-    required: [
-        "zip2zip",
-    ],
 }
 
 python_defaults {
@@ -468,9 +465,6 @@
     data: [
         "testdata/**/*",
     ],
-    required: [
-        "otatools",
-    ],
 }
 
 python_test_host {