Remove unused import.

This import was used for toggleable hal functionality. However,
now that functionality in LegacySupport.h is no longer being used,
we no longer need this import.

Bug: 34274385
Test: none
Change-Id: I5dc86d556688c65a9b0c3c8edeffdcce6593e2e3
diff --git a/generateCpp.cpp b/generateCpp.cpp
index 79a45a6..9f07fdc 100644
--- a/generateCpp.cpp
+++ b/generateCpp.cpp
@@ -1041,9 +1041,6 @@
         // This is a no-op for IServiceManager itself.
         out << "#include <android/hidl/manager/1.0/IServiceManager.h>\n";
 
-        // TODO(b/34274385) remove this
-        out << "#include <hidl/LegacySupport.h>\n";
-
         generateCppPackageInclude(out, mPackage, iface->getProxyName());
         generateCppPackageInclude(out, mPackage, iface->getStubName());
         generateCppPackageInclude(out, mPackage, iface->getPassthroughName());