Reverted changes in scipy's spkg-install to unset MACOSX_DEPLOYMENT_TARGET to 11 on Big Sur

Author: zlscherr

build/pkgs/scipy/spkg-install.in

@@ -10,10 +10,6 @@ if [ "$UNAME" = "Darwin" ]; then
     unset LAPACK
     export LDFLAGS="-bundle -undefined dynamic_lookup $LDFLAGS"
     export CPPFLAGS="-D__ACCELERATE__ $CPPFLAGS"
-    # For building on OS X 11: see https://trac.sagemath.org/ticket/31183.
-    if [ $MACOSX_VERSION -ge 20 ]; then
-        export MACOSX_DEPLOYMENT_TARGET=11.0
-    fi
 else
     export {ATLAS,PTATLAS,OPENBLAS,MKL,MKLROOT}=None
     export LDFLAGS="-shared $LDFLAGS"