Update docs to be more accurate about fastbuild

Fastbuild support has been removed.

PiperOrigin-RevId: 238478619
diff --git a/site/docs/faq.md b/site/docs/faq.md
index a41b4cf..0baf1ae 100644
--- a/site/docs/faq.md
+++ b/site/docs/faq.md
@@ -3,10 +3,12 @@
 title: FAQ
 ---
 
-# How do I build for debug/fastbuild/release?
+# How do I build for debug or release?
 
 Tulsi generated projects behave just like Xcode projects in this respect. You
-simply change the build configuration for your target scheme.
+simply change the build configuration for your target scheme. Note that Tulsi
+does not support Bazel's fastbuild compilation mode due to debugging
+limitations.
 
 1. Open up the scheme editor. You can do this via cmd-< or through the UI.
 2. Change the current build configuration in the "Info" pane.
diff --git a/site/docs/gettingstarted.md b/site/docs/gettingstarted.md
index 9ce5446..57a241c 100644
--- a/site/docs/gettingstarted.md
+++ b/site/docs/gettingstarted.md
@@ -44,8 +44,8 @@
 
 Mode dependent flags:
 
-*   `--compilation_mode` - set to `dbg`, `opt`, or `fastbuild` depending on the
-    Xcode build mode (Debug, Release, or Fastbuild).
+*   `--compilation_mode` - set to `dbg` or `opt` depending on the Xcode build
+    mode (Debug or Release).
 
 Debug mode flags:
 
diff --git a/src/TulsiGenerator/en.lproj/Options.strings b/src/TulsiGenerator/en.lproj/Options.strings
index 5bc051c..77e7f81 100644
--- a/src/TulsiGenerator/en.lproj/Options.strings
+++ b/src/TulsiGenerator/en.lproj/Options.strings
@@ -11,7 +11,6 @@
 "BazelBuildOptions" = "'build' options";
 "BazelBuildOptions_DESC" = "Options for bazel 'build' invocations.";
 "BazelBuildOptionsDebug" = "Debug";
-"BazelBuildOptionsFastbuild" = "Fastbuild";
 "BazelBuildOptionsRelease" = "Release";
 
 "ProjectGenerationCompilationMode" = "Bazel --compilation_mode for project generation";
@@ -23,7 +22,6 @@
 "BazelBuildStartupOptions" = "'build' startup options";
 "BazelBuildStartupOptions_DESC" = "Startup options for bazel 'build' invocations.";
 "BazelBuildStartupOptionsDebug" = "Debug";
-"BazelBuildStartupOptionsFastbuild" = "Fastbuild";
 "BazelBuildStartupOptionsRelease" = "Release";
 
 "BazelContinueBuildingAfterError" = "Continue building after error";