docs: remove adb install option

b/19731712

Change-Id: Ie000ce7cedde9599488ba00dcf28d0e31b0cdf87
diff --git a/docs/html/tools/help/adb.jd b/docs/html/tools/help/adb.jd
index e2dd196..41c6686 100644
--- a/docs/html/tools/help/adb.jd
+++ b/docs/html/tools/help/adb.jd
@@ -962,7 +962,6 @@
 </code></td>
 <td>Installs a package (specified by {@code &lt;PATH>}) to the system.  <p>Options:
   <ul>
-    <li>{@code -l}: Install the package with forward lock.
     <li>{@code -r}: Reinstall an exisiting app, keeping its data.
     <li>{@code -t}: Allow test APKs to be installed.
     <li>{@code -i &lt;INSTALLER_PACKAGE_NAME>}: Specify the installer package name.