[CMake] Remove unneeded CLANG_DEFAULT_PIE_ON_LINUX canonicalization after D115751

GitOrigin-RevId: b5d3bbcc9433193351a22b738c7ff4b007cb1e68
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 00243d8..69d639f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -228,9 +228,6 @@
     "Whether clang should use a new process for the CC1 invocation")
 
 option(CLANG_DEFAULT_PIE_ON_LINUX "Default to -fPIE and -pie on Linux" OFF)
-if(CLANG_DEFAULT_PIE_ON_LINUX)
-  set(CLANG_DEFAULT_PIE_ON_LINUX 1)
-endif()
 
 # TODO: verify the values against LangStandards.def?
 set(CLANG_DEFAULT_STD_C "" CACHE STRING