[build] remove support for embedding bitcode in host libraries (swiftlang#32730)

We are more interested in generating bitcode for the standard library.

Addresses rdar://64952135

Author: edymtt

cmake/modules/AddSwift.cmake

@@ -505,24 +505,6 @@ function(add_swift_host_library name)
   endif()
 
   if(${SWIFT_HOST_VARIANT_SDK} IN_LIST SWIFT_APPLE_PLATFORMS)
-    # Include LLVM Bitcode slices for iOS, Watch OS, and Apple TV OS device libraries.
-    if(SWIFT_EMBED_BITCODE_SECTION)
-      target_compile_options(${name} PRIVATE
-        -fembed-bitcode)
-      target_link_options(${name} PRIVATE
-        "LINKER:-bitcode_bundle"
-        "LINKER:-lto_library,${LLVM_LIBRARY_DIR}/libLTO.dylib")
-
-      # Please note that using a generator expression to fit this in a single
-      # target_link_options does not work (at least in CMake 3.15 and 3.16),
-      # since that seems not to allow the LINKER: prefix to be evaluated (i.e.
-      # it will be added as-is to the linker parameters)
-      if(SWIFT_EMBED_BITCODE_SECTION_HIDE_SYMBOLS)
-        target_link_options(${name} PRIVATE
-          "LINKER:-bitcode_hide_symbols")
-      endif()
-    endif()
-
     target_link_options(${name} PRIVATE
       "LINKER:-compatibility_version,1")
     if(SWIFT_COMPILER_VERSION)