Revert "Add INSTALL_PACKAGES permission to CarShell"

This reverts commit c1f9c838dcae103092bcf181d6be3409131d55fa.

Reason for revert: Causes boot loop b/173532101

Bug: 173532101
Change-Id: Ieab6e24c699a3db0a389dc70d12b13e9b9a06aee
diff --git a/packages/CarShell/AndroidManifest.xml b/packages/CarShell/AndroidManifest.xml
index 39bedc1..d016f74 100644
--- a/packages/CarShell/AndroidManifest.xml
+++ b/packages/CarShell/AndroidManifest.xml
@@ -21,8 +21,6 @@
         coreApp="true"
         android:sharedUserId="android.uid.shell"
         >
-    <!-- To pass GtsInstallPackagesWhitelistDeviceTestCases b/173156153 -->
-    <uses-permission android:name="android.permission.INSTALL_PACKAGES" />
     <!-- Permission required for ATS tests - AtsCarHostTestCases, AtsCarDeviceApp -->
     <uses-permission android:name="android.car.permission.CAR_DRIVING_STATE" />
     <!-- Permission required for ATS tests - AtsDeviceInfo, AtsAudioDeviceTestCases -->