Remove Linaro email notifications

When Linaro was setting up the CI, they needed notifications to check
that things were working. Now that the CI is ticking along, they are
not monitoring those emails any longer. So, as discussed on Slack,
stop spamming Linaro.

Also don't notify the engineering team by default for release jobs in
the restricted repository. That's also a historical survivance, from
back when the release job would not send emails anyway (we used to
send emails only from the nightly job).

Change-Id: I47c029bb5a6df9d506b94ebd8273253609a4fcd2
diff --git a/mbed-tls-nightly-tests.yaml b/mbed-tls-nightly-tests.yaml
index 667c5b4..97bbfbb 100644
--- a/mbed-tls-nightly-tests.yaml
+++ b/mbed-tls-nightly-tests.yaml
@@ -31,12 +31,12 @@
         description: Run Windows tests
         name: RUN_WINDOWS_TEST
     - string:
-        default: 'arthur.she@linaro.org,kelley.spoon@linaro.org'
+        default: ''
         description: E-mail addresses (delimited by ,) that a report should be sent to when the test run passes
         name: TEST_PASS_EMAIL_ADDRESS
         trim: true
     - string:
-        default: 'CE-OSS-Firmware-Crypto-TLS@arm.com,arthur.she@linaro.org,kelley.spoon@linaro.org'
+        default: 'CE-OSS-Firmware-Crypto-TLS@arm.com'
         description: E-mail addresses (delimited by ,) that a report should be sent to when the test run fails
         name: TEST_FAIL_EMAIL_ADDRESS
         trim: true
diff --git a/mbedtls-restricted-release-new.yaml b/mbedtls-restricted-release-new.yaml
index 8ff738f..7d0d45a 100644
--- a/mbedtls-restricted-release-new.yaml
+++ b/mbedtls-restricted-release-new.yaml
@@ -33,12 +33,12 @@
     - string:
         name: TEST_PASS_EMAIL_ADDRESS
         description: E-mail addresses (delimited by ,) that a report should be sent to when the test run passes
-        default: 'CE-OSS-Firmware-Crypto-TLS@arm.com,arthur.she@linaro.org'
+        default: ''
         trim: true
     - string:
         name: TEST_FAIL_EMAIL_ADDRESS
         description: E-mail addresses (delimited by ,) that a report should be sent to when the test run fails
-        default: 'CE-OSS-Firmware-Crypto-TLS@arm.com,arthur.she@linaro.org'
+        default: ''
         trim: true
     pipeline-scm:
       lightweight-checkout: true