treewide: remove enableParallelBuilding = true if using cmake

pkgs/development/libraries/x265/default.nix

@@ -37,7 +37,6 @@ let
   buildLib = has12Bit: stdenv.mkDerivation rec {
     name = "libx265-${if has12Bit then "12" else "10"}-${version}";
     inherit src;
-    enableParallelBuilding = true;
 
     postPatch = ''
       sed -i 's/unknown/${version}/g' source/cmake/version.cmake
@@ -68,8 +67,6 @@ stdenv.mkDerivation rec {
   pname = "x265";
   inherit version src;
 
-  enableParallelBuilding = true;
-
   postPatch = ''
     sed -i 's/unknown/${version}/g' source/cmake/version.cmake
     sed -i 's/0.0/${version}/g' source/cmake/version.cmake