Revert "[gn] port b9496a7"

This reverts commit 14fb616.
b9496a7 got reverted in 27b2f4f.

Author: nico

llvm/utils/gn/secondary/lldb/include/lldb/Host/BUILD.gn

@@ -1,4 +1,3 @@
-import("//llvm/utils/gn/build/libs/curl/enable.gni")
 import("//llvm/utils/gn/build/libs/xml/enable.gni")
 import("//llvm/utils/gn/build/write_cmake_config.gni")
 import("libedit.gni")
@@ -37,12 +36,6 @@ write_cmake_config("Config") {
     values += [ "LLDB_ENABLE_LIBEDIT=" ]
   }
 
-  if (llvm_enable_libcurl) {
-    values += [ "LLVM_ENABLE_CURL=1" ]
-  } else {
-    values += [ "LLVM_ENABLE_CURL=" ]
-  }
-
   if (llvm_enable_libxml2) {
     values += [ "LLDB_ENABLE_LIBXML2=1" ]
   } else {