[build] Remove unused configurations (dead since removal of dart_bootstrap).

Change-Id: Ief6cb5b3092ffc32be8db5faff79cddada138a80
Reviewed-on: https://dart-review.googlesource.com/c/84549
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
diff --git a/runtime/configs.gni b/runtime/configs.gni
index b678f17..a476622 100644
--- a/runtime/configs.gni
+++ b/runtime/configs.gni
@@ -36,16 +36,6 @@
       "$_dart_runtime:dart_product_config",
     ]
 
-_precompiler_config = _base_config + [
-                        "$_dart_runtime:dart_maybe_product_config",
-                        "$_dart_runtime:dart_precompiler_config",
-                      ]
-
-_precompiler_product_config = _base_config + [
-                                "$_dart_runtime:dart_product_config",
-                                "$_dart_runtime:dart_precompiler_config",
-                              ]
-
 _nosnapshot_precompiler_base = [
   "$_dart_runtime:dart_nosnapshot_config",
   "$_dart_runtime:dart_precompiler_config",
@@ -85,16 +75,6 @@
     snapshot = true
   },
   {
-    suffix = "_with_precompiler"
-    configs = _precompiler_config
-    snapshot = true
-  },
-  {
-    suffix = "_with_precompiler_product"
-    configs = _precompiler_product_config
-    snapshot = true
-  },
-  {
     suffix = "_nosnapshot_with_precompiler"
     configs = _nosnapshot_with_precompiler_config
     snapshot = false