Remove unused entries from .gni file

These args were either previously used, but no longer are, or were never
implemented. Removing them since they are just cruft now.

Change-Id: Ie8d755868f8045b4836db608a3817837ddcb4f16
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/21200
Reviewed-by: dan sinclair <dsinclair@google.com>
diff --git a/tint_overrides_with_defaults.gni b/tint_overrides_with_defaults.gni
index 67f683c..5a70186 100644
--- a/tint_overrides_with_defaults.gni
+++ b/tint_overrides_with_defaults.gni
@@ -32,11 +32,6 @@
     tint_googletest_dir = "//third_party/googletest"
   }
 
-  # Path to spirv-tools generated files, relative to |target_gen_dir|
-  if (!defined(tint_spirv_tools_gen)) {
-    tint_spirv_tools_gen = "third_party/spirv-tools"
-  }
-
   # Path to spirv-headers checkout
   if (!defined(tint_spirv_headers_dir)) {
     tint_spirv_headers_dir = "//third_party/spirv-headers"
@@ -61,16 +56,4 @@
   if (!defined(tint_build_wgsl_writer)) {
     tint_build_wgsl_writer = false
   }
-
-  # Enable memory sanitizer
-  # TODO(rharrison): Implement sanitizer support
-  tint_enable_msan = false
-
-  # Enable address sanitizer
-  # TODO(rharrison): Implement sanitizer support
-  tint_enable_msan = false
-
-  # Enable undefined behaviour sanitizer
-  # TODO(rharrison): Implement sanitizer support
-  tint_enable_ubsan = false
 }