[infra] Remove old configurations for the "compressed" group.

Change-Id: I7c49fa13f67eb0f2f662f1a393cdf5614644604a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/284483
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
diff --git a/tools/bots/test_matrix.json b/tools/bots/test_matrix.json
index 2536f8c..043d014 100644
--- a/tools/bots/test_matrix.json
+++ b/tools/bots/test_matrix.json
@@ -1698,9 +1698,7 @@
     {
       "builders": [
         "vm-kernel-precomp-linux-debug-x64",
-        "vm-kernel-precomp-linux-debug-x64c",
-        "vm-kernel-precomp-linux-release-simarm",
-        "vm-kernel-precomp-win-debug-x64c"
+        "vm-kernel-precomp-linux-release-simarm"
       ],
       "meta": {
         "description": "This configuration is used by the vm kernel precomp debug builders. It uses 15 shards for testing to avoid 1 hour shard timeouts."
@@ -2051,8 +2049,7 @@
     },
     {
       "builders": [
-        "vm-kernel-win-debug-ia32",
-        "vm-kernel-win-debug-x64c"
+        "vm-kernel-win-debug-ia32"
       ],
       "meta": {
         "description": "This configuration is for the kernel builder group."
@@ -2175,8 +2172,7 @@
     {
       "builders": [
         "vm-kernel-linux-release-x64",
-        "vm-kernel-linux-debug-x64",
-        "vm-kernel-linux-debug-x64c"
+        "vm-kernel-linux-debug-x64"
       ],
       "meta": {
         "description": "This configuration is for the co19_2 kernel builder group."