no :: in func decls

examples/programs/defer/main.bro

@@ -6,7 +6,7 @@
 
 # The return value is captured before defers run, so the mutation here does not
 # change what is returned (Zig semantics).
-spill_check :: func() i32 {
+spill_check func() i32 {
 	x i32 = 5
 	defer x = 999
 	return x
@@ -14,7 +14,7 @@ spill_check :: func() i32 {
 
 # A function-scope defer runs only at function exit; a `break` runs the loop-body
 # defer but NOT the enclosing function-scope defer.
-enclosing_defer_check :: func() i32 {
+enclosing_defer_check func() i32 {
 	v i32 = 0
 	defer v = v + 100
 	for 0..3 |i| {
@@ -24,7 +24,7 @@ enclosing_defer_check :: func() i32 {
 	return v # 0->1 (i=0 fall-through), ->2 (i=1 break); the +100 runs after capture
 }
 
-main :: func() i32 {
+main func() i32 {
 	# 1. return value captured before defers run.
 	if (spill_check() != 5) return 101