C++: Remove last instatiation of CppModel outside CcLibraryHelper.

PiperOrigin-RevId: 185354353

src/main/java/com/google/devtools/build/lib/rules/cpp/CppModel.java

@@ -185,7 +185,6 @@ public final class CppModel {
   private final CoptsFilter coptsFilter;
   private boolean fake;
   private boolean maySaveTemps;
-  private boolean onlySingleOutput;
   private CcCompilationOutputs compilationOutputs;
 
   // link model
@@ -275,17 +274,6 @@ public CppModel setFake(boolean fake) {
     return this;
   }
 
-  /**
-   * If set, the CppModel only creates a single .o output that can be linked into a dynamic library,
-   * i.e., it never generates both PIC and non-PIC outputs. Otherwise it creates outputs that can be
-   * linked into both static binaries and dynamic libraries (if both require PIC or both require
-   * non-PIC, then it still only creates a single output). Defaults to false.
-   */
-  public CppModel setOnlySingleOutput(boolean onlySingleOutput) {
-    this.onlySingleOutput = onlySingleOutput;
-    return this;
-  }
-
   /**
    * Whether to create actions for temps. This defaults to false.
    */
@@ -478,7 +466,7 @@ private boolean getGenerateNoPicActions() {
 
     // Either you're only making a dynamic library (onlySingleOutput) or pic should be used
     // in all cases.
-    if (onlySingleOutput || usePicForBinaries) {
+    if (usePicForBinaries) {
       if (picFeatureEnabled) {
         return false;
       }