Revert "[gn] port 40fcd25 (#193293)" (#193860)

This reverts commit dd5632f.

40fcd25 was reverted in 39865a0.

Author: nico

llvm/utils/gn/secondary/lldb/test/BUILD.gn

@@ -84,7 +84,6 @@ write_lit_cfg("lit_api_site_cfg") {
             "$target_gen_dir/lldb-test-build.noindex/module-cache-lldb"),
     "LLDB_TEST_PLATFORM_URL=",
     "LLDB_TEST_PLATFORM_WORKING_DIR=",
-    "LLDB_TEST_RESOURCE_DIR=",
     "LLDB_TEST_SYSROOT=",
     "LLVM_BUILD_MODE=.",
     "LLVM_ENABLE_SHARED_LIBS=0",