simple_chrome: remove --gomadir from cros chrome-sdk command.

cros chrome-sdk was changed to use the Goma client found in $PATH in
https://crrev.com/c/2172567

Change-Id: I2654a4595cbf43338359e4c578fe53b0f7195bbd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/docs/+/2191052
Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Tested-by: William Furr <wfurr@google.com>
Commit-Queue: William Furr <wfurr@google.com>

simple_chrome_workflow.md

diff --git a/simple_chrome_workflow.md b/simple_chrome_workflow.md
index 0567385..46d6602 100644
--- a/simple_chrome_workflow.md
+++ b/simple_chrome_workflow.md
@@ -77,7 +77,7 @@
 ```
 (shell) cd /path/to/chrome/src
 (shell) export BOARD=amd64-generic
-(shell) cros chrome-sdk --board=$BOARD --log-level=info [--download-vm] [--gomadir=~/goma]
+(shell) cros chrome-sdk --board=$BOARD --log-level=info [--download-vm]
 ```
 
 The command prompt will change to look like `(sdk $BOARD $VERSION)`.
@@ -86,9 +86,7 @@
 
 1.  Fetches the Chrome OS toolchain and sysroot (SDK) for building Chrome.
 1.  Creates out_$BOARD/Release and generates or updates args.gn.
-1.  Installs and starts [Goma].  (*Non-Googlers* may need to disable this with
-    `--nogoma`, Googlers would want to reuse existing installation with
-    `--gomadir`.)
+1.  Starts [Goma].  (*Non-Googlers* may need to disable this with `--nogoma`.)
 1.  `--download-vm` will download a Chrome OS VM and a QEMU binary.
 
 ### cros chrome-sdk options