[CMake] Remove LINK_LIBRARIES option from _add_swift_executable_single

This option has been unused since commit
dd85d79. We now use
target_link_libraries instead of this option.

Author: bulbazord

cmake/modules/AddSwift.cmake

@@ -2082,7 +2082,7 @@ function(_add_swift_executable_single name)
   cmake_parse_arguments(SWIFTEXE_SINGLE
     "EXCLUDE_FROM_ALL"
     "SDK;ARCHITECTURE"
-    "DEPENDS;LLVM_COMPONENT_DEPENDS;LINK_LIBRARIES;LINK_FAT_LIBRARIES;COMPILE_FLAGS"
+    "DEPENDS;LLVM_COMPONENT_DEPENDS;LINK_FAT_LIBRARIES;COMPILE_FLAGS"
     ${ARGN})
 
   set(SWIFTEXE_SINGLE_SOURCES ${SWIFTEXE_SINGLE_UNPARSED_ARGUMENTS})
@@ -2196,7 +2196,7 @@ function(_add_swift_executable_single name)
       BINARY_DIR ${SWIFT_RUNTIME_OUTPUT_INTDIR}
       LIBRARY_DIR ${SWIFT_LIBRARY_OUTPUT_INTDIR})
 
-  target_link_libraries("${name}" PRIVATE ${SWIFTEXE_SINGLE_LINK_LIBRARIES} ${SWIFTEXE_SINGLE_LINK_FAT_LIBRARIES})
+  target_link_libraries("${name}" PRIVATE ${SWIFTEXE_SINGLE_LINK_FAT_LIBRARIES})
   swift_common_llvm_config("${name}" ${SWIFTEXE_SINGLE_LLVM_COMPONENT_DEPENDS})
 
   set_target_properties(${name}