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/runtest.vim b/src/testdir/runtest.vim
index 68c3dd3..1946282 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -283,11 +283,11 @@
   if has('reltime')
     let message ..= repeat(' ', 50 - len(message))
     let time = reltime(func_start)
-    if has('float') && reltimefloat(time) > 0.1
+    if reltimefloat(time) > 0.1
       let message = s:t_bold .. message
     endif
     let message ..= ' in ' .. reltimestr(time) .. ' seconds'
-    if has('float') && reltimefloat(time) > 0.1
+    if reltimefloat(time) > 0.1
       let message ..= s:t_normal
     endif
   endif