Revert "[gn] port enough of 2914a4b (lldb Interfaces)"

This reverts commit 08b3556.
2914a4b got reverted in e8504cb

Author: nico

llvm/utils/gn/secondary/lldb/source/Interpreter/BUILD.gn

@@ -15,7 +15,6 @@ static_library("Interpreter") {
   deps = [
     ":InterpreterProperties",
     ":InterpreterPropertiesEnum",
-    "Interfaces",
     "//lldb/source/Commands",
     "//lldb/source/Core",
     "//lldb/source/DataFormatters",