Revert "[flang] Put ISO_Fortran_binding.h where it can be easily used (#69121)"

This reverts commit e6e9084.

This is to fix #69697.

Author: psteinfeld

flang/CMakeLists.txt

@@ -273,10 +273,10 @@ if (NOT(FLANG_DEFAULT_RTLIB STREQUAL ""))
       "Default runtime library to use (empty for platform default)" FORCE)
 endif()
 
+
+
 set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")
-if (NOT PACKAGE_VERSION)
-  set(PACKAGE_VERSION ${LLVM_VERSION_MAJOR})
-endif()
+
 
 if (NOT DEFINED FLANG_VERSION_MAJOR)
   set(FLANG_VERSION_MAJOR ${LLVM_VERSION_MAJOR})
@@ -490,17 +490,3 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
     PATTERN "*.inc"
     )
 endif()
-
-# Put ISO_Fortran_binding.h into the include files of the build area now
-# so that we can run tests before installing
-include(GetClangResourceDir)
-get_clang_resource_dir(HEADER_BINARY_DIR PREFIX ${LLVM_LIBRARY_OUTPUT_INTDIR}/.. SUBDIR include)
-configure_file(
-  ${FLANG_SOURCE_DIR}/include/flang/ISO_Fortran_binding.h
-  ${HEADER_BINARY_DIR}/ISO_Fortran_binding.h)
-
-# And also install it into the install area
-get_clang_resource_dir(HEADER_INSTALL_DIR PREFIX ${CMAKE_INSTALL_PREFIX} SUBDIR include)
-install(
-  FILES ${CMAKE_INSTALL_PREFIX}/include/flang/ISO_Fortran_binding.h 
-  DESTINATION ${HEADER_INSTALL_DIR})