build: Don't link against libatomic on Linux

The dependency on libatomic was removed in 97df90f. This commit removes leftover cases that still link against libatomic.

Author: drexin

unittests/runtime/CMakeLists.txt

@@ -50,8 +50,6 @@ if(("${SWIFT_HOST_VARIANT_SDK}" STREQUAL "${SWIFT_PRIMARY_VARIANT_SDK}") AND
       ${FOUNDATION_LIBRARY}
       swiftStdlibUnittest${SWIFT_PRIMARY_VARIANT_SUFFIX}
       )
-  elseif(SWIFT_HOST_VARIANT STREQUAL "linux")
-    list(APPEND PLATFORM_TARGET_LINK_LIBRARIES "atomic")
   elseif(SWIFT_HOST_VARIANT STREQUAL "freebsd")
     find_library(EXECINFO_LIBRARY execinfo)
     list(APPEND PLATFORM_TARGET_LINK_LIBRARIES

unittests/runtime/LongTests/CMakeLists.txt

@@ -19,10 +19,6 @@ if(("${SWIFT_HOST_VARIANT_SDK}" STREQUAL "${SWIFT_PRIMARY_VARIANT_SDK}") AND
 
     # Link the Objective-C runtime.
     list(APPEND PLATFORM_TARGET_LINK_LIBRARIES "objc")
-  elseif(SWIFT_HOST_VARIANT STREQUAL "linux")
-    list(APPEND PLATFORM_TARGET_LINK_LIBRARIES
-      "atomic"
-      )
   elseif(SWIFT_HOST_VARIANT STREQUAL "freebsd")
     find_library(EXECINFO_LIBRARY execinfo)
     list(APPEND PLATFORM_TARGET_LINK_LIBRARIES

utils/gen-static-stdlib-link-args

@@ -61,9 +61,7 @@ function write_linkfile {
     cat >$OUTPUTFILE <<EOF
 -ldl
 -lpthread
--latomic
 -lswiftCore
--latomic
 -lswiftImageInspectionShared
 $ICU_LIBS
 -lstdc++

utils/static-executable-args.lnk

@@ -8,7 +8,6 @@
 -Xlinker
 --defsym=__import_pthread_key_create=pthread_key_create
 -lpthread
--latomic
 -licui18n
 -licuuc
 -licudata