Core: Remove IsHostThread

The core no longer cares which thread is the host thread.

Cleaning up Android's HostThreadLock is left for another PR, in part
because the HostThreadLock in NativeConfig.cpp still serves a purpose,
and in part to make any issues easier to bisect.

1 files changed, 0 insertions, 1 deletions

diff --git a/Source/UnitTests/UnitTestsMain.cpp b/Source/UnitTests/UnitTestsMain.cpp
index 4eed0c6099..3edb1c1909 100644
--- a/Source/UnitTests/UnitTestsMain.cpp
+++ b/Source/UnitTests/UnitTestsMain.cpp
@@ -25,7 +25,6 @@ int main(int argc, char** argv)
 {
   fmt::print(stderr, "Running main() from UnitTestsMain.cpp\n");
   Common::RegisterMsgAlertHandler(TestMsgHandler);
-  Core::DeclareAsHostThread();
 
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();