Remove linux_memcheck from commit queue

It will be broken after the next DEPS roll

TBR=phoglund@webrtc.org

Bug: webrtc:8356
Change-Id: I46d18da244a4b0bd59544f74ffda43fdb4b2f820
No-Try: True
Reviewed-on: https://webrtc-review.googlesource.com/24040
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20734}

infra/config/cq.cfg

diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 3b66557..8ec3fe1 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -49,7 +49,8 @@
       builders { name: "linux_baremetal" }
       builders { name: "linux_compile_dbg" }
       builders { name: "linux_libfuzzer_rel" }
-      builders { name: "linux_memcheck" }
+      # TODO(bugs.webrtc.org/8356): Investigate fixing and re-enabling.
+      #builders { name: "linux_memcheck" }
       builders { name: "linux_msan" }
       builders { name: "linux_rel" }
       builders { name: "linux_tsan2" }