patch 9.0.0491: no good reason to build without the float feature

Problem:    No good reason to build without the float feature.
Solution:   Remove configure check for float and "#ifdef FEAT_FLOAT".
diff --git a/src/testdir/test_perl.vim b/src/testdir/test_perl.vim
index cf4ca75..681aaae 100644
--- a/src/testdir/test_perl.vim
+++ b/src/testdir/test_perl.vim
@@ -163,11 +163,7 @@
   call assert_equal(0, perleval('0'))
   call assert_equal(2, perleval('2'))
   call assert_equal(-2, perleval('-2'))
-  if has('float')
-    call assert_equal(2.5, perleval('2.5'))
-  else
-    call assert_equal(2, perleval('2.5'))
-  end
+  call assert_equal(2.5, perleval('2.5'))
 
   sandbox call assert_equal(2, perleval('2'))