Remove the dup line to address review comment.

Author: DanielCChen

llvm/CMakeLists.txt

@@ -123,7 +123,6 @@ if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
   list(REMOVE_ITEM LLVM_ALL_PROJECTS openmp)
 endif()
 
-# The flang project is not yet part of "all" projects (see C++ requirements)
 # The flang project is not yet part of "all" projects (see C++ requirements)
 set(LLVM_EXTRA_PROJECTS "flang")
 # List of all known projects in the mono repo