Automated rollback of commit 87388e2.

*** Reason for rollback ***

Removing this because it's less surprising for rule authors if execution configurations start from default flags.

*** Original change description ***

Add getExec method to FragmentOptions.

This acts similarly to getHost, except:
1. It is intended to generate options for the exec transition, and
2. The default is to clone the options, not start with defaults.

Part of work on execution transitions, #7935.

PiperOrigin-RevId: 246788700

src/main/java/com/google/devtools/build/lib/analysis/config/BuildOptions.java

@@ -95,15 +95,6 @@ public BuildOptions createHostOptions() {
     return builder.addStarlarkOptions(skylarkOptionsMap).build();
   }
 
-  /** Creates a new BuildOptions instance for exec. */
-  public BuildOptions createExecOptions() {
-    Builder builder = builder();
-    for (FragmentOptions options : fragmentOptionsMap.values()) {
-      builder.addFragmentOptions(options.getExec());
-    }
-    return builder.addStarlarkOptions(skylarkOptionsMap).build();
-  }
-
   /**
    * Returns {@code BuildOptions} that are otherwise identical to this one, but contain only options
    * from the given {@link FragmentOptions} classes (plus build configuration options).

src/main/java/com/google/devtools/build/lib/analysis/config/FragmentOptions.java

@@ -47,18 +47,11 @@ public FragmentOptions getDefault() {
    * Creates a new instance of this {@code FragmentOptions} with all flags adjusted as needed to
    * represent the host platform.
    */
+  @SuppressWarnings("unused")
   public FragmentOptions getHost() {
     return getDefault();
   }
 
-  /**
-   * Creates a new instance of this {@code FragmentOptions} with all flags adjusted as needed to
-   * represent the execution platform.
-   */
-  public FragmentOptions getExec() {
-    return clone();
-  }
-
   /**
    * Returns an instance of {@code FragmentOptions} with all flags adjusted to be suitable for
    * forming configurations.