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/locale.c b/src/locale.c
index 1c72c43..d0378ff 100644
--- a/src/locale.c
+++ b/src/locale.c
@@ -225,7 +225,7 @@
     // Tell Gtk not to change our locale settings.
     gtk_disable_setlocale();
 # endif
-# if defined(FEAT_FLOAT) && defined(LC_NUMERIC)
+# if defined(LC_NUMERIC)
     // Make sure strtod() uses a decimal point, not a comma.
     setlocale(LC_NUMERIC, "C");
 # endif
@@ -333,7 +333,7 @@
 # endif
 	{
 	    loc = setlocale(what, (char *)name);
-# if defined(FEAT_FLOAT) && defined(LC_NUMERIC)
+# if defined(LC_NUMERIC)
 	    // Make sure strtod() uses a decimal point, not a comma.
 	    setlocale(LC_NUMERIC, "C");
 # endif