Remove redundant command line option.

build/android/envsetup_functions.sh

Index: build/android/envsetup_functions.sh
diff --git a/build/android/envsetup_functions.sh b/build/android/envsetup_functions.sh
index da8a4ee57a3d4da47f250bb92b4da3f2bc061dfd..c2594c51e4d9231b0a154b58065767fb19fbc6c8 100755
--- a/build/android/envsetup_functions.sh
+++ b/build/android/envsetup_functions.sh
@@ -165,11 +165,10 @@ common_gyp_vars() {
 # environment ANDROID_NDK_ROOT must be set to Android NDK's root path.  The
 # ANDROID_SDK_ROOT only needs to be set to override the default SDK which is in
 # the tree under $ROOT/src/third_party/android_tools/sdk.
-# TODO(navabi): Add NDK to $ROOT/src/third_party/android_tools/ndk.
 # To build Chromium for Android with NDK/SDK follow the steps below:
 #  > export ANDROID_NDK_ROOT=<android ndk root>
 #  > export ANDROID_SDK_ROOT=<android sdk root> # to override the default sdk
-#  > . build/android/envsetup.sh --sdk
+#  > . build/android/envsetup.sh
 #  > make
 ################################################################################
 sdk_build_init() {
@@ -188,7 +187,6 @@ sdk_build_init() {
     export ANDROID_SDK_ROOT="${CHROME_SRC}/third_party/android_tools/sdk/"
   fi
 
-  # Makes sure ANDROID_BUILD_TOP is unset if build has option --sdk
   unset ANDROID_BUILD_TOP
 
   # Set default target.