set_soenv: remove leftovers from tcsh and .bat file support

This silences the new "Unknown type!" error messages at the end of a
./configure run.

This should not make any functional difference, as the support for
those in ToFile was already missing.

set_soenv.in

@@ -2062,7 +2062,6 @@ ToFile( "ZIPDEP",        $perlpre."zipdep.pl",      "e" );
 # Writing the aliases to file.
 ToFile( "Aliases.",          $empty,             "c" );
 ToFile( "Don't set aliases when bootstrapping", $empty, "c" );
-ToFile( 'if ( ! ${?_ISBOOTSTRAP_} ) then', $empty, "y");
 ToFile( "if test -z \"\$_ISBOOTSTRAP_\"; then", $empty, "z");
 
 ToFile( "alias mkout",       $mkout,             "a" );
@@ -2077,7 +2076,6 @@ if ( $platform =~ m/os2/ )
 {  ToFile( "alias gunzip",       "gzip -d",         "a" );
 }
 
-ToFile( "endif",             $empty, "y");
 ToFile( "fi",                $empty, "z");
 
 # Check if the right dmake version is used. (W32 only)
@@ -2085,8 +2083,6 @@ if ( $platform =~ m/cygwin/ ) {
     ToFile( "Check if the right dmake version is used.", $empty, "c" );
     # Invalidate build environment.
     ToFile( "WORK_STAMP", "_invalid_", "e" );
-    # Don't test the dmake version if this file is sourced by bootstrap
-    ToFile( "bash -c 'if test -n \"\$_ISBOOTSTRAP_\" || (dmake.exe -V | grep -e \"-cygwin\\|OS := cygwin\" > /dev/null ); then true; else echo -e \"\\n\\nERROR: Not a cygwin build dmake or dmake missing, please check!\\n\\n\" ; sleep 5; false ; fi' || exit 1", $empty, "y");
     # Restore valid environment if test was successful.
     ToFile( "WORK_STAMP",        $WORK_STAMP,        "e" );
     ToFile( "", $empty, "n");
@@ -2267,7 +2263,6 @@ sub CreateFileHeader
 #                   a - alias
 #                   c - comment
 #                   n - newline
-#                   x - raw, write as is to OUT_BAT
 #                   z - raw, write as is to OUT
 # Return value:  void
 #---------------------------------------------------------