Disable clang tidy and metrics analyzer in tricium

These machines are using the main linux pool, which is overloaded.
See bug for more details.

No-Presubmit: true
Bug: 1133410
Change-Id: I4b29e1d343c1dcbf46d185251db931199f06b322
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438852
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@google.com>
Reviewed-by: Quinten Yearsley <qyearsley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811805}

infra/config/generated/tricium-prod.cfg

@@ -64,11 +64,6 @@ functions {
 
 # Selections (enabled functions)
 
-selections {
-  function: "ClangTidy"
-  platform: LINUX
-}
-
 selections {
   function: "GitFileIsolator"
   platform: UBUNTU
@@ -79,11 +74,6 @@ selections {
   platform: UBUNTU
 }
 
-selections {
-  function: "Metrics"
-  platform: UBUNTU
-}
-
 selections {
   function: "MojomCommentator"
   platform: UBUNTU

infra/config/tricium-prod.cfg

@@ -64,11 +64,6 @@ functions {
 
 # Selections (enabled functions)
 
-selections {
-  function: "ClangTidy"
-  platform: LINUX
-}
-
 selections {
   function: "GitFileIsolator"
   platform: UBUNTU
@@ -79,11 +74,6 @@ selections {
   platform: UBUNTU
 }
 
-selections {
-  function: "Metrics"
-  platform: UBUNTU
-}
-
 selections {
   function: "MojomCommentator"
   platform: UBUNTU