Remove SMA macro

The `sma.myc` file, which defined the Simple Moving Average macro, has
been removed. This functionality is no longer needed.

rtl/sma.myc

@@ -1,20 +0,0 @@
-(do
- (def SMA
-    (fn [length]
-      (do
-        (def history (series length))
-        (def sum 0.0)
-
-		(fn [val]
-           (do
-             (def hist_len (len history))
-             (if (>= hist_len length)
-               (assign sum (- sum (history (- length 1)))))
-
-  		      (push history val)
-              (assign sum (+ sum val))
-
-              (if (>= hist_len length)
-                (/ sum length))
-           )))))
-)

src/ast/rtl/prelude.myc

@@ -2,6 +2,8 @@
 ;; Standard macros and core utilities.
 
 (do
+  (def func1 (print "Hello World"))
+
   (macro while [cond body]
     `((fn [] (if ~cond
                (do ~body (again))