commit 5d3031d6268680428790b16c997081ea084b5f95
author Ed Tanous <edtanous@google.com> Wed Feb 16 15:57:15 2022 -0800
committer Ed Tanous <ed@tanous.net> Sat Feb 19 00:02:06 2022 +0000
tree 19d2a4ee09bf8ade2747e36c169495ffc82d7af1
parent 86cafa64da0fec88610a905addbd6824a88c43ac

Fix shellcheck issue in userid-validation

Shellcheck correctly notes that that xs in comparisons are uneeded

```
[1mIn jenkins/userid-validation line 25:[0m [0mif [
"x${COMMITTER_EMAIL}" == "x" ]; then[0m [32m     ^-------------------^
SC2268 (style): Avoid x-prefix in comparisons as it no longer serves a
purpose.[0m

[1mDid you mean: [0m if [ "${COMMITTER_EMAIL}" == "" ]; then

[1mIn jenkins/userid-validation line 38:[0m [0mif [
"x${COMMITTER_USERNAME}" == "x" ]; then[0m [32m
^----------------------^ SC2268 (style): Avoid x-prefix in comparisons
as it no longer serves a purpose.[0m
```

Do as the robot commands.

Tested: Not sure how to test this, although it's pretty trivial.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Idfa440f146e90f77e7b84eb0ff5f2d68f6b612c1